Faculty Profiles - ADACHI Minoru

Papers - ADACHI Minoru

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Continuation of extracurricular sports activities contribute to higher physical fitness and maintaining academic performance Reviewed

Kensaku Sasayama, Keiko Nonoue, Takayo Tada, Minoru Adachi

Sport Sciences for Health 2024.5

大学体育授業におけるe-Learningを活用した身体活動増進プログラムの効果 Reviewed

鈴木久雄, 榎本翔太, 加賀勝, 足立稔, 酒向治子, 高岡敦史, 髙橋徹, 山内愛, 高戸仁郎, 枝松千尋, 菊川顕, 宇田康利, 岡井克明, 齋藤智美, 松本希, 小崎遼介, 吉村利佐子, 岡崎勘造

大学体育スポーツ学研究 21 41 - 50 2024.3

Positive relationships of character strengths with fitness and physical activity in primary school children Reviewed

Kensaku Sasayama, Tomoya Imura, Minoru Adachi, Tazuko Aoki, Minglu Li

Health Psychology and Behavioral Medicine 11 ( 1 ) 2023.11

Positive relationships of character strengths with fitness and physical activity in primary school children. International journal

Kensaku Sasayama, Tomoya Imura, Minoru Adachi, Tazuko Aoki, Minglu Li

Health psychology and behavioral medicine 11 ( 1 ) 2278290 - 2278290 2023

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: This study is the first to examine the relationship between character strengths, objective physical fitness, and physical activity in primary school children. DESIGN: This cross-sectional study was conducted in 2016 and 2017 at a school in Japan. Main Outcome Measures: We obtained informed consent from 236 fourth-grade students; 122 fifth-grade students; and 142 sixth-grade students. After excluding participants with missing data, 473 children (247 boys and 226 girls; aged 9-12 years) with informed consent were included in the study. We measured character strengths, physical fitness, and/or physical activity of fourth- to sixth-grade participants. RESULTS: Among boys, the total score of physical fitness was significantly associated with perseverance-honesty, courage-ideas, compassion-gratitude, and fairness-care (p < 0.05). Among girls, the total score of physical fitness was significantly associated with perseverance-honesty, courage-ideas, and compassion-gratitude (p < 0.05). Regarding the relationship between character strengths and physical activity, perseverance-honesty was significantly associated with total steps and moderate-to-vigorous physical activity (MVPA), whereas courage ideas were significantly associated with total steps (p < 0.05) in boys. In girls, perseverance-honesty was associated with MVPA (p < 0.05). CONCLUSIONS: Our findings revealed that character strengths are positively associated with objective physical fitness and physical activity in primary-school children.

DOI： 10.1080/21642850.2023.2278290

Comparison of ActiGraph GT9X Link with two Japanese accelerometers for assessments of free-living physical activity in junior high school students. Reviewed International journal

Kensaku Sasayama, Minoru Adachi

BMC research notes 13 ( 1 ) 390 - 390 2020.8

Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: This study compared the measurements of total steps and moderate-to-vigorous physical activity (MVPA) between ActiGraph and the Lifecorder and Active Style Pro accelerometers in junior high school students. RESULTS: The total steps and MVPA significantly differed between ActiGraph and Lifecorder measurements, whereas the intraclass correlation coefficients (ICCs) for total steps and MVPA between the two accelerometers were not significant. There was no significant difference between the total steps measured using ActiGraph and Active Style Pro, and moderate agreement was noted. Additionally, MVPA measured using ActiGraph and Active Style Pro significantly differed, whereas the ICC for MVPA measured using the two accelerometers was not significant. When comparing the total steps between ActiGraph and Lifecorder and MVPA between ActiGraph and Lifecorder or Active Style Pro, it should be noted that the accelerometer measurements are not compatible.

DOI： 10.1186/s13104-020-05231-x

小学6 年生の夏休み前後における身体活動量，生活習慣，運動能力の比較 Reviewed

笹山健作, 引原有輝, 足立稔

発育発達研究 ( 88 ) 22 - 29 2020.6

Secular changes in total steps and moderate-to-vigorous physical activity among fourth-grade students in Japan in 2003/2004 and 2016/2017. International journal

Kensaku Sasayama, Minoru Adachi

Journal of sports sciences 38 ( 4 ) 416 - 421 2020.2

Language：English Publishing type：Research paper (scientific journal)

No study has investigated secular changes in both total steps and moderate-to-vigorous physical activity (MVPA) among Japanese children. This study examined the secular changes of total steps and MVPA among fourth-grade students in Japan in 2003/2004 and 2016/2017. It was performed at a school in Okayama Prefecture in Japan. A total of 452 participants (226 boys and 226 girls; mean age, 9.6 ± 0.5 years) participated in the study. We measured total steps and MVPA of the participants by using the same methods in 2003/2004 and 2016/2017. An uniaxial accelerometer was used to measure total steps and MVPA. On weekdays and weekends, the total steps and MVPA were lowered by approximately 1,000-3,000 steps/day and 10 min/day, respectively, in boys and by 1,000 steps/day and 5 min/day, respectively, in girls in 2016/2017 in comparison to 2003/2004. In both boys and girls, the percentage of children meeting 60 minutes/day of MVPA decreased in 2016/2017(weekdays: boys 21.8%, girls 6.0%; weekends: boys 3.8%, girls 4.1%) compared with 2003/2004 (weekdays: boys 48.2%, girls 11.6%; weekends: boys 7.8%, girls 7.6%). In conclusion, the results demonstrated that total steps and MVPA of fourth-grade students in Japan were lower in 2016/2017 than in 2003/2004.

DOI： 10.1080/02640414.2019.1705053

中学校生徒の欠席日数の実態ならびに多日数欠席の新規発生に関わる因子の縦断的検討

長野真弓, 足立稔

日本健康心理学会大会発表論文集 32 152 2019.9

Tracking of objective physical activity and physical fitness in Japanese children. International journal

Kensaku Sasayama, Minoru Adachi

BMC research notes 12 ( 1 ) 252 - 252 2019.5

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: The purpose of this study was to examine the tracking of objective physical activity and physical fitness from childhood to adolescence in Japanese children. The longitudinal study comprised 368 participants (aged 9-10 years) in 2008, and the study involved 134 participants (aged 13-14 years, a dropout rate of 63.6%) in 2011. After excluding participants with missing data, a total of 111 participants (46 boys and 65 girls) were available for study. Step counts and moderate-to-vigorous physical activity (MVPA) were measured using a uniaxial accelerometer. Physical fitness was assessed using the following tests: hand grip, sit-ups, sit and reach, side-to-side steps, 20-m shuttle run, 50-m dash, standing broad jump and ball throwing. RESULTS: In boys, there was a significant correlation between objective physical activity and all physical fitness tests at baseline and follow-up. In girls, although there was no significant correlation between objective physical activity at baseline and follow-up, all physical fitness tests at baseline and follow-up were significantly correlated. In conclusion, moderate tracking was shown in objective physical activity of boys from childhood to adolescence. In addition, moderate to high tracking was shown in physical fitness of both sexes from childhood to adolescence.

DOI： 10.1186/s13104-019-4288-y

Cross-sectional and longitudinal relationship between physical fitness and academic achievement in Japanese adolescents

Kensaku Sasayama, Keiko Nonoue, Takayo Tada, Minoru Adachi

European Journal of Sport Science 2019.3

Comparison of physical activity using questionnaire and accelerometer in 4th grade children

Kensaku Sasayama, Minoru Adachi

Japanese Journal of Physical Fitness and Sports Medicine 68 ( 1 ) 91 - 96 2019

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Physical Fitness and Sports Medicine

The purpose of this study was to assess physical activity using questionnaires and an accelerometer in 4th grade children (aged 9-10 years) and compare differences between the methods of evaluation. Fourth elementary school children were selected (total = 221), including 106 boys and 115 girls. The participants were investigated on their anthropometry and physical activity. The questionnaire was used to evaluate exercise time and the accelerometer was used to measure moderate-to-vigorous physical activity (MVPA). During weekdays and weekdays, the exercise time was significantly higher than MVPA for girls. For boys, the exercise time was significantly higher than MVPA only on the weekends. As a result of Bland-Altman analysis, for both boys and girls in weekday and weekends, mean of questionnaire and accelerometer was associated with difference of questionnaire and accelerometer (Boys in weekday, r = 0.777, p &lt
0.001
Boys in weekends, r = 0.964, p &lt
0.001
Girls in weekday, r = 0.731, p &lt
0.001
Girls in weekends, r = 0.937, p &lt
0.001). In conclusion, our results suggested that a questionnaire-based evaluation of exercise time shows significant difference compared with accelerometer-based measurement of MVPA. In addition, exercise time of questionnaire-based evaluation was higher than MVPA of accelerometer-based measurement for both boys and girls on all days.

DOI： 10.7600/jspfsm.68.91

小学4 年生における文部科学省の質問紙で評価した運動時間と加速度計で評価した中高強度身体活動の比較 Reviewed

笹山健作, 足立稔

体力科学 68 ( 1 ) 91 - 96 2018.10

Sports activity in childhood is related to lower risk of symptoms of depression in junior high school boys: Two-year follow-up study Reviewed

Nagano Mayumi, Adachi Minoru

JOURNAL OF PHYSICAL ACTIVITY & HEALTH 15 ( 10 ) S145 - S145 2018.10

Identity of subject content composition in physical education

( 167 ) 55 - 60 2018.8

親の運動嗜好と子どもの体力との関連性の検討

長野真弓, 足立稔

発育発達研究 2018 ( 78 ) 24 - 34 2018.3

Language：Japanese Publisher：日本発育発達学会

In this study, the association of parental exercise preferences with children's fitness were investigated in 546 children of 1-6 grades and their parents in a local public- and a suburban private school. As a result, even though adjustments were made with other factors related to physical fitness, the odds ratio for children's low fitness was 6.4 in the group of parents having low exercise preferences, which was significantly higher than that of parents having high exercise preferences. The odds ratio of children's low fitness in the group of either parent having high exercise preference was almost equal to that in the group of both parents having high exercise preferences. On the other hand, no significant association was recognized between children's fitness and the actual exercise habits of each parent. In conclusion, it was considered that the parental exercise preferences might be one of the strong relevant factors of children's fitness.

DOI： 10.5332/hatsuhatsu.2018.78_24

DOI： 10.1186/s12199-020-00892-3_references_DOI_POZTGki6uZMlzdjzFg4ws1wVdD

Other Link： http://id.ndl.go.jp/bib/028960289

中学生における精神的回復力と関連する要因の探索

長野真弓, 佐藤安子, 足立稔

日本健康心理学会大会発表論文集 31 P95 2018

自覚的ストレスの変動に応じた中学生の精神的回復力のダイナミクス

佐藤安子, 長野真弓, 足立稔

日本健康心理学会大会発表論文集 31 P80 2018

Changes in attitude toward endurance running in senior high school students with different levels of physical fitness

笹山健作, 西原智子, 大口正行, 芝田孝, 足立稔

体育学研究 62 ( 1 ) 203 - 214 2017.6

Language：Japanese Publisher：日本体育学会

This study examined changes in attitude toward endurance running in senior high school students with different levels of physical fitness, and this study assessed mood and calculation functions of students before and after endurance running. The participants were 250 senior high school students (119 boys and 131 girls). Endurance running was practiced at a slow pace (slow jogging pace; heart rate: 30-35 [15 s]; rate of perceived exertion (RPE): 11-13). Attitudes toward endurance running were assessed before and after the unit using a questionnaire. Attitudes toward endurance running, more specifically positivity and importance, were calculated in terms of a positive feeling score and cognitive score. In addition, negative attitudes toward endurance running were expressed as a negative feeling score. Changes in mood and calculation function were investigated in the participants and a control group. In the control group, comprising 75 boys and 41 girls, the changes of mood and calculation function were assessed before and after a health class. After the unit, the positive feeling and cognitive score increased significantly and the negative feeling score decreased significantly in both the lower and higher fitness groups. After endurance running, although levels of arousal in the control group were not increased in both boys and girls, arousal levels were increased significantly in both sexes in both the lower and higher fitness groups. The degree of mood change and the degree of attitude change were related significantly to the degree of change in perceived pleasure and the change in the positive feeling score for boys in the higher fitness group. Moreover, the degree of change in perceived pleasure and the degree of change in the positive and negative feeling scores were related significantly for girls in the lower fitness group. These results suggest that slow jogging in a unit, involving how students experience mood and calculation functions, leads to an increase in positive attitude toward endurance running. However, further investigation is necessary to examine the influence of slow jogging on mood and calculation functions, and the influence on attitude toward endurance running in this type of unit.<br>

DOI： 10.5432/jjpehss.16045

客観的データに基づく学校教育方針決定への支援子どもの「生きる力」を向上させる取り組みの一例

長野真弓, 足立稔

日本健康教育学会誌 25 ( Suppl. ) 176 - 176 2017.6

Tracking Of Clustered Metabolic Syndrome Risk Factor In Japanese Children Reviewed

Kensaku Sasayama, Minoru Adachi

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 49 ( 5 ) 975 - 975 2017.5

School grade and sex differences in domain-specific sedentary behaviors among Japanese elementary school children: a cross-sectional study. International journal

Kaori Ishii, Ai Shibata, Minoru Adachi, Yoshiyuki Mano, Koichiro Oka

BMC public health 17 ( 1 ) 318 - 318 2017.4

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: It is vital to reduce the proportion of sedentary behavior in children. Understanding the duration and behavioral context is needed. The present study examined school-grade and sex differences in domain-specific sedentary times and concurrence with screen-time guidelines among Japanese elementary school children. METHODS: A total of 625 children (330 boys) were surveyed in 2010 and 2014. Using a questionnaire, data regarding participants' grade (first through third grades: lower grades; fourth through six grades: higher grades), sex, weight, and height were collected in addition to the time spent per day engaging in each specific sedentary behavior separately: (1) reading or listening to music, (2) TV or video viewing, (3) TV game use, (4) internet use excluding class, (5) homework, and (6) car travel. Two-way analysis of covariance and logistic regression analyses, adjusted for BMI and moderate to vigorous physical activity, were used to examine school-grade and sex differences in sedentary behaviors and the independent risk of exceeding recommended total daily screen time (< 2 h). RESULTS: On 625 children, mean minutes (SD) of sedentary behavior per week in (1) - (6) were 90.3 (123.4), 535.0 (356.6), 167.3 (222.1), 23.9 (70.9), 264.9 (185.3), and 33.4 (61.2) in weekdays and 42.1 (70.0), 323.9 (232.0), 123.0 (96.4), 15.8 (49.9), 74.4 (96.4), and 71.3 (84.9) in weekends, respectively. There were differences in the minutes of sedentary behavior between participants of 2010 and 2014; e.g., TV game use and homework in weekdays and weekdays and car travel in weekends. Boys spent more time in TV game use, and girls spent more time reading, listening to music, doing homework, and car travel. Higher-grade students spent more time reading or listening to music, using a computer, and doing homework. Higher-grade students were 2.09 times (95% CI: 1.32 - 3.30) in whole week, 2.08 times (95% CI: 1.45 - 3.00) in weekday, and 1.88 times (95% CI: 1.29 - 2.74) in weekend more likely to spend ≥2 h per day in domains (2) - (4) (screen-time) than lower-grade students. CONCLUSIONS: Time spent engaging in each domain-specific sedentary behavior differed according to sex and school grade. Higher-grade students were less likely to meet screen-time guidelines. These findings highlight the need for domain-focused strategies to decrease sedentary behavior in Japanese school-age children.

DOI： 10.1186/s12889-017-4221-z

Objectively Measured Sedentary Behavior, Obesity, and Psychological Well-Being: A Cross-Sectional Study of Japanese Schoolchildren

Kaori Ishii, Ai Shibata, Minoru Adachi, Yoshiyuki Mano, Koichiro Oka

JOURNAL OF PHYSICAL ACTIVITY & HEALTH 14 ( 4 ) 270 - 274 2017.4

Language：English Publishing type：Research paper (scientific journal) Publisher：HUMAN KINETICS PUBL INC

Background: Sedentary behaviors (SB) are associated with health indicators; however, there are currently very few studies that have examined these associations, especially in conjunction with psychological factors, in children. The current study examined the independent relationship between objectively assessed SB, and indicators of obesity and psychological, well-being, among Japanese children. Methods: A total of 967 elementary-school children completed a cross-sectional survey. SB was measured with accelerometers for 7 consecutive days. Psychological well-being data (eg, anxiety and behavior problems) were collected via a self-report questionnaire. To determine the relationship of SB with degree of obesity and psychological well-being, linear regression analyses were conducted to relate the indicators of obesity and psychological well-being on SB, adjusted by gender, grade, percentage of moderate-to-vigorous physical activity per day, duration spent wearing the accelerometer, and degree of obesity. Results: SB was significantly related to behavioral/emotional problems (beta = .280, P = .010, R-2 = .015). There was a statistically significant relationship between SB and anxiety (beta = .206, P = .059, R-2 = .007). No significant association with degree of obesity was found. Conclusions: Excess SB relates higher levels of behavioral/emotional problems and anxiety. These results can inspire the development of interventions that promote well-being and enhance psychological health, by focusing on SB in Japanese children.

DOI： 10.1123/jpah.2016-0374

School grade and sex differences in domain-specific sedentary behaviors among Japanese elementary school children: a cross-sectional study

Kaori Ishii, Ai Shibata, Minoru Adachi, Yoshiyuki Mano, Koichiro Oka

BMC PUBLIC HEALTH 17 ( 1 ) 14 - 34 2017.4

Language：English Publishing type：Research paper (scientific journal) Publisher：BIOMED CENTRAL LTD

Background: It is vital to reduce the proportion of sedentary behavior in children. Understanding the duration and behavioral context is needed. The present study examined school-grade and sex differences in domain-specific sedentary times and concurrence with screen-time guidelines among Japanese elementary school children.
Methods: A total of 625 children (330 boys) were surveyed in 2010 and 2014. Using a questionnaire, data regarding participants' grade (first through third grades: lower grades; fourth through six grades: higher grades), sex, weight, and height were collected in addition to the time spent per day engaging in each specific sedentary behavior separately: (1) reading or listening to music, (2) TV or video viewing, (3) TV game use, (4) internet use excluding class, (5) homework, and (6) car travel. Two-way analysis of covariance and logistic regression analyses, adjusted for BMI and moderate to vigorous physical activity, were used to examine school-grade and sex differences in sedentary behaviors and the independent risk of exceeding recommended total daily screen time (< 2 h).
Results: On 625 children, mean minutes (SD) of sedentary behavior per week in (1) - (6) were 90.3 (123.4), 535.0 (356.6), 167.3 (222.1), 23.9 (70.9), 264.9 (185.3), and 33.4 (61.2) in weekdays and 42.1 (70.0), 323.9 (232.0), 123.0 (96.4), 15.8 (49.9), 74.4 (96.4), and 71.3 (84.9) in weekends, respectively. There were differences in the minutes of sedentary behavior between participants of 2010 and 2014; e.g., TV game use and homework in weekdays and weekdays and car travel in weekends. Boys spent more time in TV game use, and girls spent more time reading, listening to music, doing homework, and car travel. Higher-grade students spent more time reading or listening to music, using a computer, and doing homework. Higher-grade students were 2.09 times (95% CI: 1.32 - 3.30) in whole week, 2.08 times (95% CI: 1.45 - 3.00) in weekday, and 1.88 times (95% CI: 1.29 - 2.74) in weekend more likely to spend >= 2 h per day in domains (2) - (4) (screen-time) than lower-grade students.
Conclusions: Time spent engaging in each domain-specific sedentary behavior differed according to sex and school grade. Higher-grade students were less likely to meet screen-time guidelines. These findings highlight the need for domain-focused strategies to decrease sedentary behavior in Japanese school-age children.

DOI： 10.1186/s12889-017-4221-z

Objectively Measured Sedentary Behavior, Obesity, and Psychological Well-Being: A Cross-Sectional Study of Japanese Schoolchildren. International journal

Kaori Ishii, Ai Shibata, Minoru Adachi, Yoshiyuki Mano, Koichiro Oka

Journal of physical activity & health 14 ( 4 ) 270 - 274 2017.4

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Sedentary behaviors (SB) are associated with health indicators; however, there are currently very few studies that have examined these associations, especially in conjunction with psychological factors, in children. The current study examined the independent relationship between objectively assessed SB, and indicators of obesity and psychological well-being, among Japanese children. METHODS: A total of 967 elementary-school children completed a cross-sectional survey. SB was measured with accelerometers for 7 consecutive days. Psychological well-being data (eg, anxiety and behavior problems) were collected via a self-report questionnaire. To determine the relationship of SB with degree of obesity and psychological well-being, linear regression analyses were conducted to relate the indicators of obesity and psychological well-being on SB, adjusted by gender, grade, percentage of moderate-to-vigorous physical activity per day, duration spent wearing the accelerometer, and degree of obesity. RESULTS: SB was significantly related to behavioral/emotional problems (β = .280, P = .010, R2 = .015). There was a statistically significant relationship between SB and anxiety (β = .206, P = .059, R2 = .007). No significant association with degree of obesity was found. CONCLUSIONS: Excess SB relates higher levels of behavioral/emotional problems and anxiety. These results can inspire the development of interventions that promote well-being and enhance psychological health, by focusing on SB in Japanese children.

DOI： 10.1123/jpah.2016-0374

平成25〜27年度日本体力医学会プロジェクト研究の概要 Reviewed

石井好二郎, 鈴木和弘, 辻延浩, 堤公一, 長野真弓, 引原有輝, 森田憲輝, 山津幸司, 渡邊將司, 足立稔, 上地広昭, 大島秀武, 笠次良爾, 川勝佐希, 久米大祐, 國土将平, 香村恵介

体力科学 66 ( 1 ) 66 - 66 2017

Association of Physical Activity and Sedentary Behavior With Psychological Well-Being Among Japanese Children: A Two-Year Longitudinal Study Reviewed

Kaori Ishii, Ai Shibata, Minoru Adachi, Koichiro Oka

PERCEPTUAL AND MOTOR SKILLS 123 ( 2 ) 445 - 459 2016.10

Language：English Publishing type：Research paper (scientific journal) Publisher：SAGE PUBLICATIONS INC

Data on the effect of increased or decreased physical activity on children's psychological status are scarce, and effect sizes are small. This study conducted two-year longitudinal research to identify associations between physical activity, sedentary behavior, and psychological well-being in Japanese school children through a mail survey completed by 292 children aged 6-12 years. Data on sociodemographics, physical activity, sedentary behavior on weekdays and the weekend, and psychometrics (self-efficacy, anxiety, and behavioral/emotional problems) were collected using a self-reported questionnaire. A logistic regression analysis was performed, calculating odds ratios for physical activity, psychometrics, and baseline age and physical activity and sedentary behavior changes. For boys, a negative association was found between increased physical activity outside school and maintained or improved self-efficacy as opposed to a positive association in girls. Increased sedentary behavior on weekdays and long periods of sedentary behavior on weekends were associated with maintained or improved behavioral/emotional problems in girls only. This two-year longitudinal study is the first of its kind conducted in Japan. Although effect sizes were small, these results may nevertheless assist in intervention development to promote psychological well-being.

DOI： 10.1177/0031512516662645

Association of Physical Activity and Sedentary Behavior With Psychological Well-Being Among Japanese Children: A Two-Year Longitudinal Study. International journal

Kaori Ishii, Ai Shibata, Minoru Adachi, Koichiro Oka

Perceptual and motor skills 123 ( 2 ) 445 - 59 2016.10

Language：English Publishing type：Research paper (scientific journal)

Data on the effect of increased or decreased physical activity on children's psychological status are scarce, and effect sizes are small. This study conducted two-year longitudinal research to identify associations between physical activity, sedentary behavior, and psychological well-being in Japanese school children through a mail survey completed by 292 children aged 6-12 years. Data on sociodemographics, physical activity, sedentary behavior on weekdays and the weekend, and psychometrics (self-efficacy, anxiety, and behavioral/emotional problems) were collected using a self-reported questionnaire. A logistic regression analysis was performed, calculating odds ratios for physical activity, psychometrics, and baseline age and physical activity and sedentary behavior changes. For boys, a negative association was found between increased physical activity outside school and maintained or improved self-efficacy as opposed to a positive association in girls. Increased sedentary behavior on weekdays and long periods of sedentary behavior on weekends were associated with maintained or improved behavioral/emotional problems in girls only. This two-year longitudinal study is the first of its kind conducted in Japan. Although effect sizes were small, these results may nevertheless assist in intervention development to promote psychological well-being.

DOI： 10.1177/0031512516662645

青少年男子の歩・走行時における一軸加速度計の活動強度とmetabolic equivalentsとの関連

笹山健作, 足立稔

体力科学 65 ( 2 ) 265 - 272 2016.4

Association between activity level assessed by a uniaxial accelerometer and metabolic equivalents during walking and running in male youths

Kensaku Sasayama, Minoru Adachi

Japanese Journal of Physical Fitness and Sports Medicine 65 ( 2 ) 265 - 272 2016

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Physical Fitness and Sports Medicine

The purpose of this study was to investigate the association between activity levels assessed by a uniaxial accelerometer and metabolic equivalents (METs) during walking and running in school students. The participants were elementary (10 boys, 10.3 ± 0.8 years), middle (10 boys, 13.0 ± 0.9 years) and high school students (10 boys, 15.7 ± 0.7 years) who performed treadmill walking (1, 3, and 5 km/h respectively) and running (5, 7, and 9 km/h respectively) trials. Activity levels were assessed using a uniaxial accelerometer (Lifecorder EX
Suzuken Co. Ltd., Nagoya, Japan). Energy expenditure was measured by indirect calorimetry. METs and activity levels indicated by Lifecorder were highly correlated in elementary (y = 0.0432x2 + 0.0914x + 1.786, r = 0.883, p &lt
0.05), middle (y = 0.0781x2 - 0.0262x + 2.1098, r = 0.913, p &lt
0.05), and high (y = 0.0516x2 + 0.1863x + 1.7812, r = 0.876, p &lt
0.05) school students. We confirmed that higher accuracy showed LC5, LC4, and LC4 for elementary, middle, and high school students, respectively. In conclusion, this study suggests that Lifecorder intensity for ≥3 METs physical activity indicate ≥5, ≥4, and ≥4 for elementary, middle, and high school students, respectively.

DOI： 10.7600/jspfsm.65.265

Gender and grade differences in objectively measured physical activity and sedentary behavior patterns among Japanese children and adolescents: a cross-sectional study. International journal

Kaori Ishii, Ai Shibata, Minoru Adachi, Keiko Nonoue, Koichiro Oka

BMC public health 15 1254 - 1254 2015.12

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Physical activity levels in childhood have decreased, making the promotion of children's physical activity an important issue. The present study examined gender and grade differences in objectively measured sedentary behavior, physical activity, and physical activity guideline attainment among Japanese children and adolescents. METHODS: In total, 329 boys and 362 girls age 3-15 years completed the survey. School grade, gender, height, and weight were collected by questionnaires and physical activity objectively measured using an accelerometer (Lifecorder Suzuken Co.). Physical activity level (in MET) was classified as sedentary (<1.5), light (≥1.5 to <3), moderate (≥3 to <6), or vigorous (≥6). Continuous zero accelerometer counts for ≥20 min were censored and a valid accelerometry study required at least 3 days (2 weekdays and 1 weekend day) with > 600 min/day total wear time. Two-way analysis of covariance and logistic regression analyses, adjusted for weight status and accelerometer wear time, were used to examine gender and grade differences in physical activity variables and the likelihood of physical activity guideline attainment by gender and grade level. RESULTS: Participants were sedentary 441.4 (SD, 140.1) min/day or 53.7 % of the average daily accelerometer wear time of 811.2 (118.7) min, engaged in light physical activity 307.1 (70.0) min or 38.4 % of wear time, moderate physical activity 34.6 (14.8) min (4.3 %), vigorous physical activity 28.3 (19.1) min (3.6 %), and took 12462.6 (4452.5) steps/day. Boys were more physically active and took more steps/day than girls. Students in higher grades were less active than those in lower grades. Boys were significantly more likely to meet physical activity guidelines than girls (OR: 2.07, 95 % CI: 1.45-2.96). Preschoolers (6.66, 4.01-11.06), lower-grade elementary school students (17.11, 8.80-33.27), and higher-grade elementary school students (7.49, 4.71-11.92) were more likely to meet guidelines than junior high school students. CONCLUSIONS: Boys and lower-grade students engaged in more physical activity and were more likely to attain guidelines than girls and higher-grade students. These findings highlight the need for effective and sustainable strategies to promote physical activity in Japanese school children.

DOI： 10.1186/s12889-015-2607-3

Gender and grade differences in objectively measured physical activity and sedentary behavior patterns among Japanese children and adolescents: a cross-sectional study Reviewed

Kaori Ishii, Ai Shibata, Minoru Adachi, Keiko Nonoue, Koichiro Oka

BMC PUBLIC HEALTH 15 1254 2015.12

Language：English Publishing type：Research paper (scientific journal) Publisher：BIOMED CENTRAL LTD

Background: Physical activity levels in childhood have decreased, making the promotion of children's physical activity an important issue. The present study examined gender and grade differences in objectively measured sedentary behavior, physical activity, and physical activity guideline attainment among Japanese children and adolescents.
Methods: In total, 329 boys and 362 girls age 3-15 years completed the survey. School grade, gender, height, and weight were collected by questionnaires and physical activity objectively measured using an accelerometer (Lifecorder Suzuken Co.). Physical activity level (in MET) was classified as sedentary (<1.5), light (>= 1.5 to <3), moderate (>= 3 to <6), or vigorous (>= 6). Continuous zero accelerometer counts for >= 20 min were censored and a valid accelerometry study required at least 3 days (2 weekdays and 1 weekend day) with >600 min/day total wear time. Two-way analysis of covariance and logistic regression analyses, adjusted for weight status and accelerometer wear time, were used to examine gender and grade differences in physical activity variables and the likelihood of physical activity guideline attainment by gender and grade level.
Results: Participants were sedentary 441.4 (SD, 140.1) min/day or 53.7 % of the average daily accelerometer wear time of 811.2 (118.7) min, engaged in light physical activity 307.1 (70.0) min or 38.4 % of wear time, moderate physical activity 34.6 (14.8) min (4.3 %), vigorous physical activity 28.3 (19.1) min (3.6 %), and took 12462.6 (4452.5) steps/day. Boys were more physically active and took more steps/day than girls. Students in higher grades were less active than those in lower grades. Boys were significantly more likely to meet physical activity guidelines than girls (OR: 2.07, 95 % CI: 1.45-2.96). Preschoolers (6.66, 4.01-11.06), lower-grade elementary school students (17.11, 8.80-33.27), and higher-grade elementary school students (7.49, 4.71-11.92) were more likely to meet guidelines than junior high school students.
Conclusions: Boys and lower-grade students engaged in more physical activity and were more likely to attain guidelines than girls and higher-grade students. These findings highlight the need for effective and sustainable strategies to promote physical activity in Japanese school children.

DOI： 10.1186/s12889-015-2607-3

形態と身体組成の組み合わせで分類した中学生の体力と生活習慣の特徴

土井章, 笹山健作, 深山知子, 石井香織, 岡浩一朗, 足立稔

体力科学 64 ( 6 ) 638 - 638 2015.12

児童の多日数欠席に関わる生活習慣、身体活動特性および心理的特性の検討

長野真弓, 足立稔

発育発達研究 2015 ( 69 ) 14 - 24 2015.11

Language：Japanese Publisher：日本発育発達学会

本研究では、地方都市郊外の公立小学校児童を対象として、不登校の定義に至らない多日数欠席の該当する児童の特徴を生活習慣、身体活動特性および心理的特性の側面から把握するとともに、体力・スクリーンタイムの2つの身体活動特性および心理的特性が多日数欠席といかに関連するかを検討した。その結果、多日数欠席児童の特徴として、生活習慣にかかる問題(朝食欠食・遅い起床時間)に加え、低体力および長いスクリーンタイムといった身体活動特性および抑鬱・不安症状と主観的な学業不振感という好ましくない心理的特性が認められた。さらに、関連項目を調整しても、体力およびスクリーンタイムは互いに依存することなく個々に多日数欠席と関連していた。

DOI： 10.5332/hatsuhatsu.2015.69_14

Other Link： https://jlc.jst.go.jp/DN/JLC/20020756534?from=CiNii

Importance of Both Fatness and Aerobic Fitness on Metabolic Syndrome Risk in Japanese Children

Kensaku Sasayama, Eisuke Ochi, Minoru Adachi

PLOS ONE 10 ( 5 ) 2015.5

Language：English Publishing type：Research paper (scientific journal) Publisher：PUBLIC LIBRARY SCIENCE

Associations between body mass index (BMI), peak oxygen consumption (VO2peak), and metabolic syndrome (MetS) risk factors have not been adequately studied in Japanese children. Here the relationships between these parameters and the threshold aerobic fitness level necessary for low MetS risk were determined. The participants (299 children; 140 boys and 159 girls, aged 9.1 +/- 0.3 years) were divided into four groups using the medians of predicted VO2peak (pVO2peak) and BMI. MetS risk scores were calculated using z-scores. Receiver Operating Characteristic analysis was used to determine the threshold aerobic fitness level necessary for low MetS risk. The MetS risk score of the High BMI group was significantly higher than that of the Low BMI group for both sexes (p < 0.0001). However, the High BMI/High Fitness group had a significantly lower MetS risk score than the High BMI/Low Fitness group for both sexes. The pVO2peak cut-off values for low MetS risk were 47.9 and 44.9 ml/kg/min for boys and girls, respectively. Our results suggest that improvements in both fatness and aerobic fitness are important for decreasing MetS risk. We also confirmed the pVO2peak of cut-off values necessary for low MetS risk in Japanese children.

DOI： 10.1371/journal.pone.0127400

Association of fitness and screentime with psychological stress reactions: An investigation in local public and metropolitan private school children

Mayumi Nagano, Minoru Adachi, Chikako Kakoi, Shuzo Kumagai

Japanese Journal of Physical Fitness and Sports Medicine 64 ( 1 ) 195 - 206 2015

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Physical Fitness and Sports Medicine

Very few studies have reported an independent association of the physical activityrelated indices with the psychological stress reaction. The present study therefore investigated the association of fitness and screentime as one of the indices of sedentary behavior with the four types of psychological stress reactions and the number of days absent from school for 249 children at a local public school and a metropolitan private school while considering confounding factors. No significant difference was observed in the fitness level of both schools
however, the rate of obesity, the screentime and the level of all psychological stress reactions were significantly worse in the public school. Further, significant differences and trends among the groups classified by fitness level were recognized in the rates of participation in after school activities, feeling of powerlessness and days of absence per year. In addition, the odds ratio of the screentime for depressive and anxiety symptoms was 1.004 (95%CI: 1.000-1.007, p=0.039), while the odds of the fitness level for high feeling of powerlessness and more than five days of absence were 1.582 (95%CI: 1.045-2.396, p=0.030) and 1.434 (95%CI: 1.045-2.396, p=0.015), respectively, after adjusting for the school type, differences in lifestyle and participation in after school activities. In conclusion, the fitness level and the screentime were associated with high psychological stress reactions and the days of absence, independent of the above-mentioned adjusting factors among the children in the present study. Prospective and interventional studies to verify these results are needed.

DOI： 10.7600/jspfsm.64.195

Importance of both fatness and aerobic fitness on metabolic syndrome risk in Japanese children. International journal

Kensaku Sasayama, Eisuke Ochi, Minoru Adachi

PloS one 10 ( 5 ) e0127400 2015

Language：English Publishing type：Research paper (scientific journal)

Associations between body mass index (BMI), peak oxygen consumption (VO(2peak)), and metabolic syndrome (MetS) risk factors have not been adequately studied in Japanese children. Here the relationships between these parameters and the threshold aerobic fitness level necessary for low MetS risk were determined. The participants (299 children; 140 boys and 159 girls, aged 9.1 ± 0.3 years) were divided into four groups using the medians of predicted VO(2peak) (pVO(2peak)) and BMI. MetS risk scores were calculated using z-scores. Receiver Operating Characteristic analysis was used to determine the threshold aerobic fitness level necessary for low MetS risk. The MetS risk score of the High BMI group was significantly higher than that of the Low BMI group for both sexes (p < 0.0001). However, the High BMI/High Fitness group had a significantly lower MetS risk score than the High BMI/Low Fitness group for both sexes. The (p)VO(2peak )cut-off values for low MetS risk were 47.9 and 44.9 ml/kg/min for boys and girls, respectively. Our results suggest that improvements in both fatness and aerobic fitness are important for decreasing MetS risk. We also confirmed the (p)VO(2peak) of cut-off values necessary for low MetS risk in Japanese children.

DOI： 10.1371/journal.pone.0127400

中学生の首尾一貫感覚(ストレス対処能力)と関連する健康行動・意識の探索

長野真弓, 足立稔

体力科学 63 ( 6 ) 686 - 686 2014.12

Change in attitudes toward endurance running in students with different physical fitness levels

笹山健作, 尾川登太郎, 足立稔

教育実践学論集 = Journal for the science of schooling 15 ( 15 ) 235 - 242 2014.3

Relationship between Extracurricular Activities, Habitual Exercise and Academic Achievement : Eighth Grade Students

56 ( 4 ) 282 - 289 2014

The School Instructive Studies about 'Slow Jogging' Running in Elementary School Children

足立稔, 酒向治子, 笹山健作, 妹尾建一郎, 矢部晃章

研究集録 157 ( 157 ) 61 - 66 2014

Language：Japanese Publisher：岡山大学大学院教育学研究科

本研究では小学生を対象に，意図的にゆっくり走る「スロージョギング」を体育授業に導入する可能性について教育実践的に検討した。研究①では，小学1年から6年生140人を対象に，1回の授業（走行時間は学年に応じて8分～12分，走るスピードは時速4km）を実践し，授業前には形態，体力，運動が好きか嫌いかの調査を，授業前後には持久走に対するイメージ調査（楽か，楽しいか，気持ちいいかをそれぞれ4点満点で評価）を行った。研究②では，小学5年生27人を対象に，3時間（1時目は時速6キロのスピードで5分間を2回，2時目は時速6キロのスピードで続けて15分間，3時目は自分に合っていると思うゆったりしたペースで続けて15分間走る）の単元を組んで授業を行い，単元前後で研究①と同様の持久走に対するイメージ調査と20mシャトルランを行った。その結果，単元（授業）前に比べ後で，持久走に対するイメージが肯定的に変化したことに加え，運動嫌い，低体力や肥満傾向の児童においてこの傾向が顕著であった。また，単元前に比べ後でシャトルラン回数が有意に増え，単元前のシャトルラン回数が少なく有酸素的体力が低い児童ほど単元後に回数が増えていた。

異なる社会環境下にある児童の体力とメンタルヘルス・欠席日数との関連性

長野真弓, 足立稔, 栫ちか子, 熊谷秋三

体力科学 62 ( 6 ) 565 - 565 2013.12

Patterns of Physical Activity Outside of School Time Among Japanese Junior High School Students

Li He, Kaori Ishii, Ai Shibata, Minoru Adachi, Keiko Nonoue, Koichiro Oka

JOURNAL OF SCHOOL HEALTH 83 ( 9 ) 623 - 630 2013.9

Language：English Publishing type：Research paper (scientific journal) Publisher：WILEY-BLACKWELL

BACKGROUNDPhysical activity is beneficial for adolescent health. The physical activity patterns of Japanese adolescents are relatively unknown. Therefore, this study aimed to describe the current patterns of physical activity and to identify sex and grade differences among them.
METHODSThe participants comprised 714 Japanese adolescents aged 12 to 15years old (boys N=372, girls N=342) from a public junior high school in Okayama, Japan. Physical activity at school, outside of school after hours, and during lunch recess as well as the total leisure time in a usual week was assessed with a 5-item questionnaire. To assess the differences in the physical activity patterns by sex and grade, independent t tests and analysis of variance (ANOVA) were conducted, respectively.
RESULTSBoys spent significantly more time in physical activity both inside and outside of school settings than girls (p<.05). Higher grade students were significantly less active than lower grade students (p<.05). Furthermore, the physical activity patterns across the grades differed between settings (at school, outside of school during the after-school period, lunchtime recess, and at home).
CONCLUSIONTo increase physical activity levels among Japanese adolescents, implementation of after-school programs or environmental modifications developed within the school setting could be effective strategies.

DOI： 10.1111/josh.12074

Patterns of physical activity outside of school time among Japanese junior high school students. International journal

Li He, Kaori Ishii, Ai Shibata, Minoru Adachi, Keiko Nonoue, Koichiro Oka

The Journal of school health 83 ( 9 ) 623 - 30 2013.9

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Physical activity is beneficial for adolescent health. The physical activity patterns of Japanese adolescents are relatively unknown. Therefore, this study aimed to describe the current patterns of physical activity and to identify sex and grade differences among them. METHODS: The participants comprised 714 Japanese adolescents aged 12 to 15 years old (boys N = 372, girls N = 342) from a public junior high school in Okayama, Japan. Physical activity at school, outside of school after hours, and during lunch recess as well as the total leisure time in a usual week was assessed with a 5-item questionnaire. To assess the differences in the physical activity patterns by sex and grade, independent t tests and analysis of variance (ANOVA) were conducted, respectively. RESULTS: Boys spent significantly more time in physical activity both inside and outside of school settings than girls (p < .05). Higher grade students were significantly less active than lower grade students (p < .05). Furthermore, the physical activity patterns across the grades differed between settings (at school, outside of school during the after-school period, lunchtime recess, and at home). CONCLUSION: To increase physical activity levels among Japanese adolescents, implementation of after-school programs or environmental modifications developed within the school setting could be effective strategies.

DOI： 10.1111/josh.12074

子どもの身体活動および座位活動がメンタルヘルスに

石井香織, 柴田愛, 足立稔, 岡浩一朗

健康医科学 28 ( 28 ) 10 - 19 2013

Language：Japanese Publisher：(公財)明治安田厚生事業団

子どもの身体活動および座位活動がメンタルヘルスに及ぼす影響について検討した。幼稚園、小学校、中学校を対象としたコホート研究におけるデータの一部を解析した。2010年度初回調査と2012年度調査のデータを使用した。身体活動および座位活動の実施は、2年後のメンタルヘルスや身体活動および座位活動にも関連があることが示された。現在の身体活動および座位活動は、現在のメンタルヘルスのみならず2年後のメンタルヘルスと相関関係を認めた。男子においては、現在の身体活動時間が長いと現在および2年後のメンタルヘルスが良好であることが示された。女子では現在の身体活動時間が長いと現在および2年後の自己効力感は良好であるが、行動は良好ではないことが示された。また、現在の座位活動時間が長いことは女子の2年後の不安傾向および行動、また現在の行動が、男子においては、2年後の自己効力感が良好ではないことが示された。

Association Between Three-year Longitudinal Changes in Physical Strength in Children with Their Build, Health Habits, and Psychophysical Health Indexes

足立稔, 酒向治子, 笹山健作

研究集録 153 ( 153 ) 81 - 87 2013

Language：Japanese Publisher：岡山大学大学院教育学研究科

In this study we examined the association between longitudinal changes in schoolchildren＇sphysical strength with their build, health habits, and psychophysical health index scores.Students (n= 195) were followed for three years, from the fifth to the eighth grade. Setting as abaseline the students＇ results on the Ministry of Education, Culture, Sports, Science andTechnology＇s new physical strength test, we extracted data on those students whose physicalstrength relatively improved (improved group: 28 boys, 53 girls) and on those whose strengthrelatively declined (declined group: 15 boys, 16 girls). Build, health habits, and psychophysicalhealth index scores were compared between the two groups. It was found that, although therewere no significant differences in eating habits or sleeping habits between the two groups,compared to the improved group, the declined group was more likely to be either obese orunderweight, have short durations of intense exercise and total exercise, and longer duration ofwatching television or videos. The declined group also showed poorer psychological healthstatus, such as lower self-efficacy and higher anxiety. These findings indicate that children with good exercise habits, such as consistentlyengaging in a adequate physical activities that include intense exercise, will have improvedphysical strength outcome over time, whereas those children with few regular exercise habitsand whose strength will not improve over time, will show outcomes such as polarization ofbody weight (obesity and underweight tendencies) and poorer psychological health status.

Direct and indirect effects of multilevel factors on school-based physical activity among Japanese adolescent boys．

Health 5 ( 2 ) 245 - 252 2013

Mediation effects of social support on relationships of perceived environment and self-efficacy with school-based physical activity: a structural equation model tailored for Japanese adolescent girls.

Li He, Ai Shibata, Minoru Adachi, Li He, Kaori Ishii, Keiko Nonoue, Koichiro Oka

Open Journal of Preventive Medicine 3 ( 1 ) 42 - 50 2013

地方都市郊外の公立小学校児童における体力とメンタルヘルスに関する調査報告

長野真弓, 足立稔, 大植康司, 立石あつ子, 塩見優子, 熊谷秋三

心理社会学的支援研究 2 67 - 79 2012.3

ASSOCIATION BETWEEN DAILY PHYSICAL ACTIVITY AND FITNESS IN JUNIOR HIGH SCHOOL STUDENTS

Kensaku Sasayama, Minoru Adachi

JAPANESE JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 60 ( 3 ) 287 - 294 2011.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC PHYSICAL FITNESS SPORTS MEDICINE

The purpose of this study was to assess daily physical activity and time spent on activities of various intensities, and to examine the relationship between daily physical activity and physical fitness in junior high school students. The subjects were 314 junior high school students (135 boys, 179 girls, 14.0 +/- 0.1 years). Daily physical activity was evaluated using accelerometers that they wore around the waist for 10 days. The accelerometers calculated steps and time spent on activities of vigorous intensity (LC7-9: higher intensity than brisk walking). A physical fitness test (8 items) was employed to evaluate the fitness of pupils. The total accelerometer steps (counts/day) were 13772 +/- 4764 for boys and 11209 +/- 2636 for girls on weekdays, and 8311 +/- 4743 for boys and 7159 +/- 3338 for girls on weekends, respectively. On weekdays, time spent on activities with an intensity of LC7-9 (minutes/day) was 18 +/- 17 for boys and 11 +/- 7 for girls. Positive associations were found between physical fitness and daily physical activities in the case of many items. The fitness test score was significantly more highly correlated with LC7-9 than with LC1-6 in boys and girls. In the case of eighth graders, in order to reach a score of B in the physical fitness test, it was suggested that the total steps and time spent on activities with an intensity of LC7-9 may be needed at least 13000 steps and 20 minutes in boys, and 10000 steps and 10 minutes in girls, respectively. (Jpn. J. Phys. Fitness Sports Med., 60 (3) : 287 similar to 294 (2011))

DOI： 10.7600/jspfsm.60.287

エネルギー代謝と睡眠 (特集睡眠と子どもの健康)

足立稔

子どもと発育発達 8 ( 4 ) 274 - 278 2011

エネルギー代謝と睡眠

足立稔

子どもと発育発達 8 ( 4 ) 274 - 278 2011

Relationship among the enjoyable consciousness for school, somatotype, fitness, and daily-lifestyle on the fifth grader of elementary school children

Okayama journal of physical education ( 17 ) 19 - 27 2010

ASSESSING DAILY PHYSICAL ACTIVITY IN JUNIOR HIGH SCHOOL STUDENTS USING PEDOMETER WITH ACCELEROMETER

Minoru Adachi, Kensaku Sasayama, Kyota Okishima, Yoshiyuki Sunami, Masako Shiomi

JAPANESE JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 58 ( 2 ) 275 - 283 2009.4

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC PHYSICAL FITNESS SPORTS MEDICINE

The purpose of present study was to examine validity of pedometer with accelerometer (Lifecorder-EX; LC) and to assess the daily physical activity (PA) of Japanese junior high school Students by LC method. Firstly, to examine validity of LC, ten students (13.6 +/- 0.5 years old),wearing LC on their waists performed the walking and running tests. Energy expenditure was measured by the expired gas analysis method during the tests. The results showed that the activity level of LC had a high correlation with the exercise intensity ((V) over dot O(2): r=0.948, MET's : r=0.931), and it was from 7 to 9 (LC7-9) in the more intense activity than running. Secondly, PA of 206 boys and 220 girls aged 12-15 years were measured using I-C. Step Counts and activity time of LC7-9 each were 9500-15000 Counts and 10-19 minutes on weekdays, and 6500-10000 counts and 5-12 minutes on weekends. PA analyzed by MANOVA were lower on weekends than oil weekdays, and decreased in proportion as grade. and that of boys were significantly higher than that of girls. Present study suggests that LC method is a good way of measuring PA for junior school students in free-living condition. (Jpn. J. Phys. Fitness Sports Med. 2009, 58 : 275 similar to 284)

DOI： 10.7600/jspfsm.58.275

RELATIONSHIP OF DAILY PHYSICAL ACTIVITY AND FITNESS IN ELEMENTARY SCHOOL CHILDREN

Kensaku Sasayama, Kyota Okishima, Hidetugu Mizuuchi, Minoru Adachi

JAPANESE JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 58 ( 2 ) 295 - 304 2009.4

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC PHYSICAL FITNESS SPORTS MEDICINE

The purpose of this Study Was to assess daily physical activity and time spent, on activities of various intensities, and to examine the relationship between daily physical activity and physical fitness in elementary school children. Subjects were 288 elementary school children (140 boys, 148 girls, 9.6 +/- 0.5 years). Daily physical activity was evaluated by accelerometers, worn around the waist for 10 days. Accelerometers calculated steps and vigorous intensity time (LC7-9: higher intensity than brisk walking). A physical fitness test (8 items) was applied to evaluate fitness in pupils. Total accelerometer steps (counts/day) were 18333 +/- 3869 for boys and 13957 +/- 2970 for girls oil weekdays, and 11932 +/- 4827 for boys and 9767 +/- 4542 for girls on weekends. respectively. Time spent in LC7-9 (minutes/day) was 31 +/- 12 for boys and 20 +/- 7 for girls on weekdays. Positive associations were found between physical fitness and daily physical activities for manY items. Above all, there was a relatively strong correlation between aerobic capacity and LC7-9 time. On the other hand, the correlations were low among girls. For fourth graders, in order to reach a B rank score in the physical fitness test, it was suggested that the total steps and LC7-9 time required at least 17000 steps, 30 minutes in boys, and 13000 steps, 20 minutes in girls, respectively. (Jpn. J. Phys. Fitness Sports Med. 2009, 58 : 295 similar to 304)

DOI： 10.7600/jspfsm.58.295

Effects of the health education unit using team-teaching on daily physical activities of 4th grade elementary school children

足立稔, 高濱真希, 笹山健作, 石井明美, 横山宏子, 沖嶋今日太, 水内秀次

Journal for the science of schooling ( 10 ) 171 - 180 2009.3

Effects of the breakfast habit and intake on body temperature, blood glucose and subjective symptoms in university students

Bulletin of Graduate School of Education, Okayama University ( 140 ) 77 - 82 2009

保健の授業と外遊びの奨励を中心とした小学校での取り組みが児童の身体活動量に及ぼす影響

足立稔, 笹山健作

生涯スポーツ学研究 6 ( 2 ) 13 - 20 2009

大学生の身体活動・運動実践者割合および健康関心，自覚的健康状態，健康行動との関連

岡崎勘造, 鈴木久雄, 加賀勝, 大橋美勝, 山口立雄, 梶谷信之, 足立稔, 天野勝弘, 山田茂, 積山敬経, 井上裕美子, 福田隆, 伊坂忠夫, 柳等, 廣瀬勝弘, 大谷崇正, 岩橋邦彦, 井上倫明, 山崎先也, 石原一成, 佐川和則, 新宅幸憲, 林恭輔, 高橋香代

体育学研究 54 ( 2 ) 425 - 436 2009

子どもの日常生活での身体活動量の特徴（第二報）〜中学2年生の生活行動の日にち特性の異なる１日の比較研究

足立稔, 田中宏暁, 吉武裕

生涯スポーツ学研究 5巻2号・6巻1号合併号 ( 1 ) 1 - 6 2008

Daily physical activity of young children measured by accelerometer

Shiomi Masako, Sunami Yoshiyuki, Okishima Kyouta, Yoshitake Yutaka, Adachi Minoru

Japan Journal of Human Growth and Development Research 2008 ( 39 ) 1 - 6 2008

Language：Japanese Publisher：日本発育発達学会

This study aims to examine children's physical activity with accelerometer by evaluating daily steps and activity time of walking and running classified by accelerometer's intensity, and to create basic data for standard values of appropriate children's daily activity.<br>The result showed that the means of daily step counts (steps day) are 10, 000-15, 000. The activity time of walking (recorded as 1-6) is 90-120 minutes/day, and above running (recorded as 7-9) is 15-27 minutes/day. MANOVA analysis of physical activity parameter show significant between boys and girls (walk counts: F=7.27, p<0.01, LC1-6: F=9.37, p<0.01), weekday and weekend (walk counts: F=146.39, p<0.0001, LC1-6: F=107.71, p<0.0001, LC7-9: F=158.23, p<0.0001).<br>But it did not show significant difference between ages. Overall, it is shown that activity volume and intensity are smaller for girls than for boys, and on holidays than weekdays. The interaction was not significant between every combination.

DOI： 10.5332/hatsuhatsu.2008.39_1

幼児の身体活動量と体力・運動能力の関係の検討

立石あつ子, 塩見優子, 足立稔

発育発達研究 88 - 88 2008

加速度計を用いた幼児の身体活動量の評価の検討

塩見優子, 立石あつ子, 角南良幸, 沖嶋今日太, 吉武裕, 足立稔

発育発達研究 91 - 91 2008

ティームティーチングによる健康教育の授業実践が小学4年生の身体活動量に及ぼす影響

足立稔, 高濱真希, 笹山健作, 石井明美, 横山宏子, 沖嶋今日太, 水内秀次

発育発達研究 75 - 75 2008

The difference of relationships between physical activity variables and physical fitness in children and adolescents: With special reference to amount and intensity of physical activity

Yuki Hikihara, Kensaku Sasayama, Kyota Okishima, Hidetsugu Mizuuchi, Yutaka Yoshitake, Minoru Adachi, Kaoru Takamatsu

JAPANESE JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 56 ( 3 ) 327 - 338 2007.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC PHYSICAL FITNESS SPORTS MEDICINE

The purposes of this study were to investigate the relationships between physical activity variables and physical fitness, and between amount and intensity of physical activity in children and adolescents. Subjects were divided into two groups : 178 children (99 boys aged 9.8 +/- 0.6 and 79 girls aged 9.7 +/- 0.6) who had not reached the age of peak height velocity (PHV), and 336 adolescents (141 boys aged 15.0 +/- 1.1 and 195 girls aged 15.3 +/- 1.2) who had reached the age of PHV. Physical activity level (PAL : total energy expenditure/basal metabolic rate) which indicates the amount of physical activity, and time engaged in each of physical activity intensity (light, moderate and vigorous), which indicates the intensity of physical activity were estimated from uni-axial accelerometer. Physical activity was monitored for 3 consecutives days : 2 weekday and I weekend day. Moreover, physical fitness test suggested by the Ministry of Education, Culture, Sports, Science and Technology was applied. Results of this study showed that PAL was closely related to physical fitness in children, while time engaged in vigorous activity was more related to physical fitness in adolescents. On the other hand, time engaged in light and moderate activity was closely associated with PAL in younger girls, whereas in younger boys, PAL was closely related to time engaged in moderate and vigorous activity. However, time engaged in moderate activity was more related to PAL in the adolescent group. These results suggest that the relationship between physical activity variables and physical fitness and between amount and intensity of physical activity might vary according to the growth development of boys and girls respectively.

DOI： 10.7600/jspfsm.56.327

Assessing daily physical activity in elementary school students used by accelerometer: A validation study against doubly labeled water method

Minoru Adachi, Kensaku Sasayama, Yuki Hikihara, Kyota Okishima, Hidetugu Mizuuchi, Yoshiyuki Sunami, Masako Shiomi, Mamoru Nishimuta, Shigeji Kikunaga, Hiroaki Tanaka, Shinichi Saitoh, Yutaka Yoshitake

JAPANESE JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 56 ( 3 ) 347 - 355 2007.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC PHYSICAL FITNESS SPORTS MEDICINE

The purpose of present study was to examine validity of accelerometer (Lifecorder; LC) and to assess the free-living physical activity (PA) in Japanese elementary school students used by LC method. Firstly, to examine validity of LC, twelve children, aged 11.2 +/- 1.0years, were measured total energy expenditure (TEE) by doubly labeled water method and resting energy expenditure (REE) by the expired gas analysis. Physical activity energy expenditure (PAEE) is calculated as 0. 9 TEE minus REE. At the same time, PA was evaluated by both daily walk count (WC) and vigorous activity time (LC7-9) using LC method. PAEE per 1 kg body weight significantly correlated with WC (r=0.785, p < 0.005) and LC7-9 (r=0.828, p < 0.001). Secondly, 140 boys and 167 girls, aged 8-11 years were measured PA by LC method. WC and LC7-9 each were 13000-18000 counts and 16-32 minutes in week-day, and 8000-12500 counts and 8-18 minutes in week-end. PA analyzed by MANOVA were significantly higher in boys than in girls, and lower in week-end than in week-day, and decreased in proportion as grade. Present study suggests that LC method is a good measure of PA in free-living condition for elementary school students.

DOI： 10.7600/jspfsm.56.347

自家用車送迎の多い農村地域における児童の肥満と活動量および食生活（Ｉ小学校の場合）

糸井亜弥, 足立稔, 佐藤泉, 木村みさか

肥満研究 13 ( 1 ) 51 - 59 2007.4

Characteristics of physical fitness and motor ability in obese and lean child classified by combining somatotype, and body composition in adolescence

足立稔, 安東良, 前田潔

Bulletin of Faculty of Education,Okayama University ( 134 ) 75 - 84 2007

Language：Japanese Publisher：岡山大学教育学部

The purpose of this study was to clarify physical fitness(PF) characteristics of obese and lean adolescent classified by combining somatotype, and body composition. Somatotype were measured by obesity index from weight and height measurement. Body composition given as percentage body fat was calculated by measuring skinfold thickness. The measurement of PF consisted of 12 tests. In addition, comparison were made in each somatotype group between the high percentage body fat group and the normal group. PF were lower in overweight or underweight group than in normalweight group. At overweight and normalweight groups, the high percentage body fat group attained scored lower in most PF test items. However, at underweight group, normal percentage body fat group attained scored lower in 6-7 items.

思春期前後における身体活動量と体力の関連性の相違：身体活動量の「量的」および「質的」側面に着目して

引原有輝, 笹山健作, 沖嶋今日太, 水内秀次, 吉武裕, 足立稔, 高松薫

体力科学 56 ( 3 ) 327 - 338 2007

平成18年度文部科学省指定，「児童生徒の生活習慣と健康等に関する実践調査研究」報告書

足立稔

2007

Characteristics of physical fitness and motor ability in obese and lean child classified by combining somatotype, and body composition in adolescence

Bulletin of Faculty of Education,Okayama University ( 第134号 ) 75 - 84 2007

子どもの日常生活での身体活動量の特徴（第一報）〜小学3年生の生活行動の日にち特性の異なる１日の比較研究

足立稔, 田中宏暁, 吉武裕

生涯スポーツ学研究 5 ( 1 ) 13 - 18 2007

小児肥満の病態評価基準作成と肥満改善支援システム開発についての総合的研究

足立稔

平成16年度〜平成18年度科学研究費補助金（基盤研究B：研究代表者足立稔）研究成果報告書 2007

小学3年生の体力, 日常生活での身体活動量とその4年後測定値との比較研究

足立稔, 金田典子, 原哲也, 平井宏之, 太田一枝, 岩田知郎, 田中宏暁, 吉武裕

発育発達研究 76 - 76 2007

健常高齢者における脊柱のアライメント及び可動性の研究性差、活性及びバランス能力との関係

沖嶋今日太, 島田公雄, 吉村良孝, 足立稔

吉備国際大学保健福祉研究所研究紀要 ( 7 ) 35 - 41 2006.3

介護予防に有効と考えられる運動のエネルギー消費量，心拍数，心理状態（気分）について

久保晃信, 捻金秀子, 岡野和子, 神宝誠子, 武田則昭, 足立稔

旭川荘研究年報 2006

学童における姿勢に関する研究身体活動及び体力との関係

沖嶋今日太, 足立稔, 吉村良孝, 小幡太志, 中嶋正明

吉備国際大学保健福祉研究所研究紀要 ( 6 ) 39 - 48 2005.3

学齢期の小児を対象にした歩・走行スピードと加速度で測定した運動強度の関係について

足立稔, 笹山健作, 安東良

岡山大学教育学部研究集録 ( 128 ) 141 - 145 2005

肥満教室とその後の生活習慣チェックシートを用いたアップがフォロー小児肥満改善に及ぼす影響

足立稔, 沖嶋今日太, 水内秀次

岡山大学教育学部研究集録 ( 129 ) 71 - 76 2005

肥満教室とその後の生活習慣チェックシートを用いたフォローアップが小児肥満改善に及ぼす影響

足立稔, 沖嶋今日太, 水内秀次

岡山大学教育学部研究集録 ( 129 ) 71 - 76 2005

なぜ今体力づくりなのかー生活の中で身体活動量を増やすことの重要性についてー

足立稔

教育時報 2004

子どもの日常生活身体活動量の測定とその実態について

足立稔, 仲井千佳, 沖嶋今日太, 水内秀次

岡山大学教育学部研究集録 125号,191-197 ( 125 ) 191 - 197 2004

幼稚園における身体活動推進のための保育プログラムの検討ー物理的環境要因およびセルフモニタリングによる介入の効果ー

塩見優子, 平田晃子, 足立稔, 堤俊彦

平成15年度日本体育協会スポーツ医・科学研究報告 No1 2004

精神障害を有する単身生活者の現状 -対象者を含めたチームアプローチについて-

沖嶋今日太, 田邊研二, 岡須美恵, 小池好久, 安東勝弘, 足立稔, 吉村良孝

精神認知とOT 1 ( 1 ) 80 - 86 2004

学齢期の小児を対象にした歩・走行スピードと加速度で測定した運動強度の関係について

足立稔, 笹山健作, 安東良, 田中康雄, 沖嶋今日太, 水内秀次

岡山大学教育学部研究集録 2004

Studies of the relationship between OBLA speed and heart rate during distance running

Nohara Takahiko, Adachi Minoru, Haneda Noriyuki

Bulletin of Shimane Medical University 26 1 - 9 2003.9

中学生を対象にした『運動による健康づくり』の実践についての研究

足立稔, 仲井千佳, 高俊珂, 山口俊光

岡山大学教育学部研究集録 2003

中学生を対象にした『運動による健康づくり』の授業実践についての研究

足立稔, 仲井千佳, 高俊珂

岡山大学教育学部研究集録 ( 122 ) 9 - 13 2003

大学男子陸上競技長距離選手における走記録と体力要因の関係

足立稔, 料治正和

岡山体育学研究 ( 10 ) 1 - 5 2003

長距離走における乳酸蓄積臨界点での走行速度と心拍数に関する研究

野原隆彦, 足立稔, 羽根田紀幸

島根医科大学紀要 ( 26 ) 1 - 9 2003

健康に生きるためにひとはどれだけ体を動かす必要があるか

足立稔

「生」についての総合的研究ー「生きる」ことに焦点をあてた学習の構築ー平成14年度岡山大学教育学部特別配分経費報告書 2003

Exercise Induced Bronchospasm and Heart Rate at Swimming Training in Children with Bronchial Asthma

Adachi Minoru, Shindo Munehiro, Tanaka Hiroaki, Nishima Sankei

Bulletin of School of Education, Okayama University 120 31 - 35 2002.7

小学生の身体活動を中心とした生活習慣と形態・身体組成についての研究（第2報）ー1日歩数の違いによる比較ー

足立稔, 志水賢治

教育保健研究 2002

健康づくりの実践力育成を目指した持久走の授業研究 —持久走時の身体反応と認識の経日的変化の観察から—

足立稔, 岩井俊暁, 仲井千佳, 山口俊光

教科教育学研究 20 55 - 71 2002

健康づくりの実践力育成を目指した持久走の授業研究--持久走時の身体反応と認識の経日的変化の観察から (教員養成教育の探究)

足立稔, 岩井俊暁, 仲井千佳

教科教育学研究 20 55 - 71 2002

大学男子陸上競技長距離選手における走記録と体力要因の関係

足立稔, 料治正和

岡山体育学研究 2002

小・中学校教員の薬物乱用防止教育に対する意識・実態調査

足立稔

岡山大学教育学部研究集録 118 61 - 68 2001.11

Comparison of nutrient intake, and ratios of creatinine, body mass index and basal metabolic rate to mineral (Na, K, Ca, Mg, Zn, Fe, Cu) excretion in 24-hour urine between male university students with few exercise and male university distance runners

S Kikunaga, M Adachi, K Yoshikawa, O Yamamoto

JAPANESE JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 50 ( 1 ) 79 - 87 2001.2

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC PHYSICAL FITNESS SPORTS MEDICINE

This study was carried out to compare the nutrient intake, urinary excretion of mineral (Na, K, Ca, Mg, Zn, Fe, Cu), and the ratios of creatinine (Cr), body mass index (BMI) and basal metabolic rate (BMR) to the amount of mineral in 24-hour urine between both the male university students with few exercise (non-exercisers) and male university distance runners. The propriety of ratios of Cr, BMI and BMR was also examined in order to estimate intake of mineral for the male university distance runners.
There were no significant differences in the intakes of energy, protein and carbohydrate between the both groups of subjects, and those major nutrients were at reasonable levels for the both groups of subjects. On the other hand, neither the intake levels of VB6, Ca, Mg, and Cu in the non-exercisers, nor niacin, Mg and Cu in the male university distance runners reached the level of Recommended Dietary Allowance for the Japanese. The intakes of retinol, VB1, VB6 and Ca were higher in the male university distance runners than in the non-exercisers. The urinary excretion and excretion ratio to intake of Zn, excretion ratio of Na, ratios of Cr, BMI and BMR of Zn, and Cr ratio of Na were higher in the non-exercisers than those in the male university distance runners. So as to achieve the same levels of Cr ratios of Ca and Zn as the non-exercisers, the male university long distance runners should take larger amounts of those minerals than the non-exercisers. II was suggested that the ratio of BMR rather than that of Cr ratio to urinary excretion of mineral would be suitable for the estimation of a desirable intake level of mineral for the male university distance runners.

DOI： 10.7600/jspfsm1949.50.79

Comparison of nutrient intake, and ratios of creatinine, body mass index and basal metabolic rate to mineral (Na, K, Ca, Mg, Zn, Fe, Cu) excretion in 24-hour urine between male university students with few exercise and male university distance runners

Shigeshi Kikunaga, Minoru Adachi, Kazue Yoshikawa, Osamu Yamamoto

Japanese Journal of Physical Fitness and Sports Medicine 50 ( 1 ) 79 - 88 2001

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Physical Fitness and Sports Medicine

This study was carried out to compare the nutrient intake, urinary excretion of mineral (Na, K, Ca, Mg, Zn, Fe, Cu ), and the ratios of creatinine (Cr), body mass index (BMI) and basal metabolic rate (BMR) to the amount of mineral in 24-hour urine between both the male university students with few exercise (non-exercisers) and male university distance runners. The propriety of ratios of Cr, BMI and BMR was also examined in order to estimate intake of mineral for the male university distance runners. There were no significant differences in the intakes of energy, protein and carbohydrate between the both groups of subjects, and those major nutrients were at reasonable levels for the both groups of subjects. On the other hand, neither the intake levels of VB6, Ca, Mg, and Cu in the non-exercisers, nor niacin, Mg and Cu in the male university distance runners reached the level of Recommended Dietary Allowance for the Japanese. The intakes of retinol, VB1, VB6 and Ca were higher in the male university distance runners than in the non-exercisers. The urinary excretion and excretion ratio to intake of Zn, excretion ratio of Na, ratios of Cr, BMI and BMR of Zn, and Cr ratio of Na were higher in the non-exercisers than those in the male university distance runners. So as to achieve the same levels of Cr ratios of Ca and Zn as the non-exercisers, the male university long distance runners should take larger amounts of those minerals than the non-exercisers. It was suggested that the ratio of BMR rather than that of Cr ratio to urinary excretion of mineral would be suitable for the estimation of a desirable intake level of mineral for the male university distance runners.

DOI： 10.7600/jspfsm1949.50.79

岡山地区大学生の性に関する意識の調査研究

足立稔

岡山大学教育学部研究集録 ( 113 ) 149 - 155 2000.3

一過性の運動負荷に対するＡ型およびB型行動パターン者の生理的反応と主観的運動強度の比較

足立稔, 志水賢治

教育保健研究 2000

小学生の身体活動を中心とした生活習慣と形態・身体組成についての研究

志水賢治, 足立稔

教育保健研究 11 41 - 47 2000

長距離選手のSP-OBLA簡易測定法の検討

山本修, 足立稔

岡山体育学研究 ( 7 ) 11 - 18 2000

Outdoor Sports Physical Activity Estimated by Heart Rate Monitoring

Adachi Minoru

Bulletin of School of Education, Okayama University 112 ( 112 ) 117 - 121 1999.11

心拍数を目安にした持久走の授業実践

岩田知朗, 足立稔

教科教育学研究 17 ( 17 ) 59 - 69 1999

中学生男女の形態とボディーイメージの関係

足立稔, 志水賢治

研究集録 108 1 - 6 1998.7

喘息児における水泳トレーニング中の心拍数と運動誘発性気管支攣縮

足立稔, 進藤宗洋, 田中宏暁, 西間三馨

学校保健研究 39 106 - 107 1997.10

簡易スタミナテストを導入した持久走の授業についての一考察 (教科教育の理論と実践)

足立稔

教科教育学研究 ( 15 ) 95 - 107 1997

長距離選手の競技力評価法の研究(第2報) : 5000m, 1000m走の記録からのSP-OBLA推定の試み

足立稔

研究集録 103 85 - 90 1996.11

脳卒中易発症ラットとその食塩感受性について

足立稔

研究集録 102 123 - 129 1996.7

長距離選手の競技力評価法の研究(第1報)-高校生を対象にしたOBLAと競技力の検討-

足立稔

岡山大学教育学部研究集録 ( 101 ) 115 - 120 1996.3

Effect of β-Blockade on Physical Parameter during Long-Time Exercise

Okayama Journal of Pysical Education ( 4 ) 1 1996

EFFECT OF DIETARY MAGNESIUM SUPPLEMENTATION ON INTRALYMPHOCYTIC FREE CALCIUM AND MAGNESIUM IN STROKE-PRONE SPONTANEOUSLY HYPERTENSIVE RATS

M ADACHI, Y NARA, M MANO, Y YAMORI

CLINICAL AND EXPERIMENTAL HYPERTENSION 16 ( 3 ) 317 - 326 1994.5

Language：English Publishing type：Research paper (scientific journal) Publisher：MARCEL DEKKER INC

The effects of dietary magnesium (Mg) supplementation on intralymphocytic free Ca2+ ([Ca2+]i) and Mg2+ ([Mg2+]i) were examined in the stroke-prone spontaneously hypertensive rats (SHRSP) at the age of 10 weeks. After 40 day Mg supplementation (0.8% Mg in the diet), systolic blood pressure (SBP) was significantly lower in Mg supplemented group (Mg group) than the control group (0.2% Mg). [Ca2+]i was significantly lower and [Mg2+]i was significantly higher in Mg group than in the control group. Further, [Ca2+]i was positively and [Mg2+]i was negatively correlated with SBP. These results suggest that dietary Mg supplementation modifies [Ca2+]i and [Mg2+]i, and modulates the development of hypertension.

DOI： 10.3109/10641969409072219

INTRALYMPHOCYTIC FREE CALCIUM AND MAGNESIUM IN STROKE-PRONE SPONTANEOUSLY HYPERTENSIVE RATS AND EFFECTS OF BLOOD-PRESSURE AND VARIOUS ANTIHYPERTENSIVE AGENTS

M ADACHI, Y NARA, M MANO, K IKEDA, R HORIE, Y YAMORI

CLINICAL AND EXPERIMENTAL PHARMACOLOGY AND PHYSIOLOGY 20 ( 9 ) 587 - 593 1993.9

Language：English Publishing type：Research paper (scientific journal) Publisher：BLACKWELL SCIENCE

1. Free Ca2+ ([Ca2+]i) and Mg2+ ([Mg2+]i) were measured in peripheral lymphocytes from stroke-prone spontaneously hypertensive rats (SHRSP) and normotensive Wistar-Kyoto rats (WKY) at the age of 5, 7 and 17 weeks, from various antihypertensive agents-treated SHRSP, and from secondary hypertensive WKY.
2. At the age of 5 weeks, no difference was observed in systolic blood pressure (SBP), or lymphocyte [Ca2+]i and [Mg2+]i between SHRSP and WKY. At the age of 7 or 17 weeks, SBP and [Ca2+]i of SHRSP were significantly higher than in WKY, and at the age of 17 weeks, [Mg2+]i of SHRSP was significantly lower than in WKY. Further, [Ca2+]i or [Mg2+]i was positively or negatively correlated to SBP, and [Mg2+]i was negatively correlated to [Ca2+]i .
3. SBP of SHRSP fell significantly after antihypertensive treatment with calcium antagonist, angiotensin-converting enzyme (ACE) inhibitor or hydralazine for 40 days. [Ca2+]i was significantly lower in calcium antagonist and hydralazine groups, and tended to be low in ACE inhibitor group. These four groups showed no difference in [Mg2+]i.
4. After 40-day administration of N(G)-nitro-L-arginine (L-NNA), WKY developed severe hypertension, but there were no significant differences in lymphocyte [Ca2+]i and [Mg2+]i between the L-NNA treated and non-treated groups.
5. These results suggested that increased lymphocyte [Ca2+]i and decreased [Mg2+]i observed in SHRSP are not only secondary to hypertension but possibly related to a basic genetic abnormality of divalent cation handling.

DOI： 10.1111/j.1440-1681.1993.tb01745.x

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