Authorship：Lead author,　Corresponding author  

DOI： 10.1038/s41366-024-01483-w

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1265/ehpm.23-00110

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

INTRODUCTION: There is evidence regarding the association between dysmenorrhea and irritable bowel syndrome (IBS), although it is lacking in the Asian population. Therefore, the purpose of this study was to investigate the association between menstrual status and IBS in a young Japanese. METHODS: Overall, 4693 female college students were included in the analysis of this study. Information regarding lifestyle habits, menstrual status (irregularity, pain severity, and medication), and IBS (Rome III criteria) was obtained using a self-reported questionnaire. Age, body mass index, exercise habits, smoking, drinking habits, and anemia were analyzed as potential confounders. RESULTS: The prevalence of IBS was 6.1%. Moderate (adjusted odds ratio [OR]: 1.89 [95% confidence interval (CI): 1.27-2.91]) and heavy (adjusted OR: 2.14 [95% CI: 1.42-3.45]) menstrual pain was independently positively associated with IBS (p for trend = 0.001). Using medication sometimes (adjusted OR: 1.41 [95% CI: 1.09-1.84]) and often (adjusted OR: 1.60 [95% CI: 1.13-2.24]) was independently positively associated with IBS. There was no association between menstrual cycle and IBS. In subjects without functional dyspepsia, irregular menstrual cycle was independently positively associated with IBS. CONCLUSION: In the young Japanese population, menstrual pain and medications for menstrual pain may have a significant positive association with IBS.

DOI： 10.1159/000533264

PubMed

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

OBJECTIVE: Evidence regarding the association between exercise habits and irritable bowel syndrome (IBS) remains scarce in a young population. It is also unknown whether the existence of an exercise partner affects this issue. The purpose of this study was to explore the association between exercise habits that include an exercise partner and IBS in a young Japanese population. METHODS: This study enrolled 8923 Japanese university students and examined exercise frequency and intensity, and exercise partners using self-administered questionnaires. IBS and functional dyspepsia were defined according to the Rome III criteria. RESULTS: The prevalence of IBS in this survey was 6.5%. Moderate frequency exercise was inversely related with IBS [adjusted odds ratio (aOR): 0.65 (95% confidence interval, CI: 0.51-0.83), P for trend = 0.005]. Moderate and high exercise intensities were independently and inversely related with IBS, respectively [aORs were moderate: 0.76 (95% CI: 0.61-0.95) and high: 0.62 (95% CI: 0.48-0.78), P for trend = 0.001]. Exercising with a group or with friends instead of alone was independently inversely related with IBS [aOR with groups: 0.53 (95% CI: 0.40-0.70) and with friends: aOR 0.71 (95% CI: 0.54-0.93)]. After excluding subjects with overlapping IBS and functional dyspepsia, an inverse association between high intensity of exercise or exercise in a group and IBS remained significant. CONCLUSION: The frequency and intensity of exercise may be independently inversely related with IBS in a young Japanese population. Also, exercise with others may be important for preventing IBS.

DOI： 10.1097/MEG.0000000000002561

PubMed

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Age-related changes in physical function are closely associated with daily activity impairment among the elderly. Continuous maslinic acid intake may improve skeletal muscle mass; however, the concentration-dependent benefits of maslinic acid for physical functionality remain unclear. Therefore, we evaluated the bioavailability of maslinic acid and examined the effect of maslinic acid intake on skeletal muscle and quality of life in the healthy Japanese elderly. Five healthy adult men were administered test diets containing 30, 60, or 120 mg of maslinic acid. Analysis of plasma maslinic acid revealed concentration-dependent elevations in blood maslinic acid levels (p<0.01). Next, 69 healthy Japanese adult men and women were administered a placebo or 30 or 60 mg of maslinic acid continuously for 12 weeks with physical exercise in a randomized, double-blind, placebo-controlled trial. The trunk muscle mass (p<0.05) and vitality score according to the Short-Form-8 (p<0.05) were significantly higher in the 60 mg maslinic acid group than in the placebo group. Additionally, grip strength was significantly higher in the 30 (p<0.05) and 60 mg (p<0.05) groups than in the placebo group. Overall, maslinic acid intake with physical exercise improved muscle strength, muscle mass, and quality of life in a maslinic acid-intake-dependent manner.

DOI： 10.3164/jcbn.23-5

PubMed

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

PURPOSE: The association between body mass index (BMI) and irritable bowel syndrome (IBS) has been inconsistent in the Asian population. Also, no evidence regarding this issue in the young population exists. The aim of the present study is to investigate the association between BMI and IBS based on the Rome III criteria in young Japanese people. METHODS: This study was a cross-sectional study consisted of 8923 Japanese university students. The definition of IBS was based on the Rome III criteria. BMI was divided into four categories (quartiles) on the basis of the study subjects' distribution (lowest, low, moderate, and high [reference]). The definition of lean, normal, and overweight was BMI < 18.5 kg/m2, 18.5 ≤ BMI < 25 kg/m2 (reference), and 25 ≤ BMI kg/m2, respectively. Age, sex, drinking, smoking, exercise habit, anemia, and sports injury were selected a priori as potential confounding factors. RESULTS: The prevalence of IBS was 6.5%, with females having a significantly higher prevalence than males (6.0% vs. 7.2%, p = 0.029). In females, being overweight was independently positively associated with IBS after adjustment (adjusted odds ratio [OR]: 1.81 [95% confidence interval (CI): 1.13-2.79]). In contrast, in males, no association between being lean or overweight and IBS was found. CONCLUSIONS: Among the young Japanese population, being overweight might be independently positively associated with prevalence of IBS in females but not in males.

DOI： 10.1007/s00384-022-04267-8

PubMed

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BACKGROUND: Relative age effect is defined as a phenomenon where children born early generally perform better than children born later in the same cohort. Physical activity is an important factor that might be influenced by the relative age effect. Socioeconomic factors (e.g., parent's income, education level) are also associated with the adolescent's physical activity. However, no existing study has examined whether socioeconomic factors moderate the relative age effect on the adolescent's physical activity. This study aims to clarify whether and how birth month and socioeconomic factors relate to organized sports and physical activity among adolescents in Japan. METHODS: We conducted a questionnaire survey targeting 21,491 adolescents who live in a widespread neighborhood. We included 8102 adolescents (4087 males and 4015 females: mean age 13.1 ± 1.4) in the analysis. Based on the participants' birth months, we divided them into four groups (April to June, July to September, October to December, January to March). We asked participants to report their organized sports participation. Using the International Physical Activity Questionnaire for Japanese Early Adolescents, we identified their moderate to vigorous physical activity (MVPA). Neighborhood-level socioeconomic factors (areal deprivation, average annual income, education level) were analyzed based on national surveys, such as the population census. We performed multilevel logistic and linear regression analysis for organized sports participation and MVPA, respectively. Moreover, a simple slope analysis was implemented if the interaction between birth month and socioeconomic factor was significant in the multilevel linear regression analysis. RESULTS: Among males, relatively younger adolescents (adolescents who were born later in the same grade) were less likely to participate in organized sports activites (OR=0.90, 95% CI 0.82-0.97, p<0.05), while both males and females engaged in less MVPA (b=-0.54, b=-0.25, p< 0.01, respectively). We observed an interaction between birth month and socioeconomic factors. Among males in low-income neighborhoods, and females in more deprived neighborhoods, relatively younger adolescents engaged in less MVPA. CONCLUSIONS: Socioeconomic factors moderate the relative age effect on adolescents' physical activity. The relative age effect on adolescents' physical activity might be more likely to appear among adolescents from socioeconomically disadvantaged neighborhoods.

DOI： 10.1186/s12889-022-14052-5

PubMed

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

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BACKGROUND: Although 10 000 steps per day is widely promoted to have health benefits, there is little evidence to support this recommendation. We aimed to determine the association between number of steps per day and stepping rate with all-cause mortality. METHODS: In this meta-analysis, we identified studies investigating the effect of daily step count on all-cause mortality in adults (aged ≥18 years), via a previously published systematic review and expert knowledge of the field. We asked participating study investigators to process their participant-level data following a standardised protocol. The primary outcome was all-cause mortality collected from death certificates and country registries. We analysed the dose-response association of steps per day and stepping rate with all-cause mortality. We did Cox proportional hazards regression analyses using study-specific quartiles of steps per day and calculated hazard ratios (HRs) with inverse-variance weighted random effects models. FINDINGS: We identified 15 studies, of which seven were published and eight were unpublished, with study start dates between 1999 and 2018. The total sample included 47 471 adults, among whom there were 3013 deaths (10·1 per 1000 participant-years) over a median follow-up of 7·1 years ([IQR 4·3-9·9]; total sum of follow-up across studies was 297 837 person-years). Quartile median steps per day were 3553 for quartile 1, 5801 for quartile 2, 7842 for quartile 3, and 10 901 for quartile 4. Compared with the lowest quartile, the adjusted HR for all-cause mortality was 0·60 (95% CI 0·51-0·71) for quartile 2, 0·55 (0·49-0·62) for quartile 3, and 0·47 (0·39-0·57) for quartile 4. Restricted cubic splines showed progressively decreasing risk of mortality among adults aged 60 years and older with increasing number of steps per day until 6000-8000 steps per day and among adults younger than 60 years until 8000-10 000 steps per day. Adjusting for number of steps per day, comparing quartile 1 with quartile 4, the association between higher stepping rates and mortality was attenuated but remained significant for a peak of 30 min (HR 0·67 [95% CI 0·56-0·83]) and a peak of 60 min (0·67 [0·50-0·90]), but not significant for time (min per day) spent walking at 40 steps per min or faster (1·12 [0·96-1·32]) and 100 steps per min or faster (0·86 [0·58-1·28]). INTERPRETATION: Taking more steps per day was associated with a progressively lower risk of all-cause mortality, up to a level that varied by age. The findings from this meta-analysis can be used to inform step guidelines for public health promotion of physical activity. FUNDING: US Centers for Disease Control and Prevention.

DOI： 10.1016/S2468-2667(21)00302-9

PubMed

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BACKGROUND: Functional dyspepsia (FD) is a very common disease worldwide. Dysmenorrhea impairs quality of life among females of reproductive age. Although dysmenorrhea is associated with irritable bowel syndrome (IBS), no study has yet evaluated the association between dysmenorrhea and FD. METHODS: This study's subjects consisted of 4693 female Japanese university students. We defined FD according to the Rome III criteria. Subjects completed a self-reported questionnaire regarding menstrual irregularity, menstrual pain, and medication for menstrual pain. Age, body mass index, drinking, smoking, exercise habit, anemia, and first-year student status were selected as potential confounding factors. RESULTS: The prevalence of FD, epigastric pain syndrome (EPS), and postprandial distress syndrome (PDS) was 2.5%, 0.6%, and 2.1%, respectively. Heavy menstrual pain was independently positively associated with FD and PDS but not EPS (adjusted ORs: FD, 3.18 [95% CI: 1.60-6.89] and PDS, 2.93 [95% CI: 1.56-7.93] for heavy menstrual pain, p for trend = 0.001 and 0.004, respectively). Using medication for menstrual pain often was independently positively associated with FD, EPS, and PDS, respectively, (adjusted ORs: FD, 2.41 [95% CI: 1.50-3.83], EPS, 2.93 [95% CI: 1.04-7.93], PDS, 2.44 [95% CI: 1.46-4.01]). Irregular menstrual cycle was not associated with FD or with subtype of FD. CONCLUSION: Among the young female Japanese population, menstrual pain might be independently positively associated with FD and PDS but not EPS. The use of medication for menstrual pain might be independently positively associated with FD including subtype of FD.

DOI： 10.1111/nmo.14324

PubMed

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AIMS: In this study, the effects of licorice flavonoid oil (LFO) supplementation on mobility functions were evaluated in middle-aged and older women who underwent daily physical exercise. METHODS: The 73 women aged 59-85 years (71.2 ± 5.2 years) were randomly assigned to the LFO group (n = 37) or the placebo group (n = 36). For 16 weeks, the LFO group consumed a daily capsule containing 300 mg of LFO, while the placebo group consumed a placebo capsule. All participants were instructed to complete a strength training program during the 16 weeks and to increase their daily step count by 1000. 10-m walking speed (with/no obstruction), one-leg standing time with eyes open, handgrip strength, isometric knee extension strength, and body composition were evaluated at baseline and every eight weeks. RESULTS: In the 10-m walking speeds (with/no obstruction), LFO supplementation did not show significant improvements. One-leg standing time was significantly prolonged with LFO intake (LFO: baseline 73.9 s vs 16 weeks 93.5, placebo: baseline 82.8 vs 16 weeks 87.1, p = 0.03). In addition, a significant decrease in BMI and body fat percentage with LFO was found (p = 0.01, p = 0.03, respectively). DISCUSSION: Since a lower BMI corresponds to a lighter physical load on the lower limb, in addition, since LFO might improve skeletal muscle function by antioxidant activity, participants could stand longer and body balance control was improved. CONCLUSION: LFO supplementation improved body balance control and may contribute to fall prevention in healthy middle-aged and older women having daily physical exercise. TRIAL REGISTRATION: UMIN Clinical Trial Registry No. 000029712.

DOI： 10.1007/s40520-020-01513-3

PubMed

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BACKGROUND: Evidence regarding the association between sleep disturbance and functional dyspepsia (FD) remains limited in the young population. AIMS: This study aimed to investigate the association between sleep disturbance and FD including subgroups among Japanese young people. METHODS: Study subjects were 8923 university students. FD was defined according to the Rome III criteria. Subjects with FD were further categorized as having postprandial distress syndrome (PDS) or epigastric pain syndrome (EPS). Subjects completed a self-reported questionnaire assessing self-reported sleep duration, sleep disturbance, difficulty falling asleep, deep sleep disorder, nocturnal awakening, early awakening, and daytime sleepiness. RESULTS: The prevalence of FD was 1.9%. After adjustment, all types of sleep disturbances were independently positively associated with FD (total sleep disturbance: OR 4.11 [95% CI: 2.89-5.78], difficulty falling asleep: OR 3.97 [95% CI: 2.53-6.01], deep sleep disorder: OR 4.85 [95% CI: 3.06-7.40], nocturnal awakening: OR 4.35 [95% CI: 1.90-8.67], early awakening: OR 4.50 [95% CI: 1.97-8.97], and daytime sleepiness: OR 2.83 [95% CI: 1.25-5.56]). While nocturnal awakening and daytime sleepiness were not associated with EPS, the other types of sleep disturbance were independently positively associated with EPS and PDS. No association between self-reported sleep duration and FD was found. CONCLUSIONS: Sleep disturbance may be independently positively associated with the prevalence of FD among Japanese young people. Nocturnal awakening and daytime sleepiness were not associated with EPS; the other types of sleep disturbance were independently positively associated with EPS and PDS.

DOI： 10.1007/s10620-021-07260-3

PubMed

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1539/eohp.2021-0003-OA

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

J-GLOBAL

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Publishing type：Research paper (scientific journal)   Publisher：SAGE Publications  

Objective: This study examined the relationship between neighborhood food and physical activity environment, and obesity among elementary and junior high school students in Japan. Methods: The participants were fifth- to ninth-grade children (n=7277), who were attending municipal schools in Japan. Percent overweight (POW) was calculated using their age, gender, height, and weight, which were collected through a questionnaire. A POW of &lt; 20% was considered non-obese, while ≥ 20% was considered obese. Furthermore, using a geographic information system, we investigated the density of convenience stores, fast-food stores, casual restaurants, supermarkets and department stores, parks, sports facilities, stations, and intersections in the school district. Additionally, from the census, we obtained information regarding the population density of the municipality where the participants’ schools were located. Multiple logistic regression analysis was used to examine the relationship between obesity and food environment (the food environment model), between obesity and physical activity environment (the physical activity environment model), and among obesity, food, and physical activity environment (the food and physical activity environment model). Results: In the food environment model and the food and physical activity environment model, the density of convenience stores showed a significant positive association. In the physical activity environment model, the density of stations showed a significant negative association. Conclusion: This study’s findings can contribute to the development of appropriate community interventions for improving children’s health in Japan and similar areas.

DOI： 10.1177/00469580211055626

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Other Link： http://journals.sagepub.com/doi/full-xml/10.1177/00469580211055626

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Public Library of Science (PLoS)  

The current focus of meeting the physical activity guidelines for children and young people include preventing conditions such as high blood cholesterol, high blood pressure, metabolic syndrome, obesity, low bone density, depression, and injuries. However, the relationship between sleep habits and meeting physical activity guidelines is still unclear. This study aimed to assess this relationship among fifth- to eighth-grade (ages 10–14) Japanese children. This cross-sectional study included 3,123 children (boys: 1,558, girls: 1,565, mean age: 12.5 ± 1.2 years). Questionnaires were used to assess parameters such as moderate-to-vigorous physical activity per day, school and weekend night sleep durations, social jetlag, daytime sleepiness, napping, screen time, and breakfast intake. Participants were divided into an achievement and a non-achievement group depending on their physical activity guideline achievement status (i.e., whether they met the children’s physical activity guideline of 60 min or more of moderate-to-vigorous physical activity per day). Then, to determine the sleep habits in relation to the children’s achievement of guideline-recommended physical activity levels, multivariate logistic regression analyses were conducted. In fifth- and sixth-grade (ages 10–12) boys, an inverse association was observed between physical activity guideline achievement and daytime sleepiness. In seventh- and eighth-grade (ages 12–14) boys, physical activity guideline achievement was inversely associated with social jetlag and skipping breakfast. Additionally, in seventh- and eighth-grade girls, physical activity guideline achievement was inversely associated with inappropriate sleep duration on weekends and screen time. These results suggest that meeting the physical activity guideline is related to favorable sleep habits in Japanese children. However, their relevance may differ by school type and gender.

DOI： 10.1371/journal.pone.0242517

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Authorship：Lead author,　Corresponding author  

DOI： 10.24804/ree.1915

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Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Society of Physical Fitness and Sports Medicine  

DOI： 10.7600/jspfsm.69.143

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DOI： 10.14789/jmj.2019.65.JMJ19-OA04

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Authorship：Lead author,　Corresponding author  

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：BioMed Central Ltd.  

Background: This study aimed to examine the relationship between pedometer-assessed daily step count and all-cause mortality in a sample of elderly Japanese people. Methods: Participants included 419 (228 males and 191 females) physically independent, community-dwelling 71-year-old Japanese people. The number of steps per day was measured by a waist-mounted pedometer for seven consecutive days at baseline. Participants were divided into quartiles based on their average number of steps/day (first quartile, &lt
4503 steps/day
second quartile, 4503-6110 steps/day
third quartile, 6111-7971 steps/day
fourth quartile, &gt
7972 steps/day) and were followed up over a mean period of 9.8 years (1999-2010) for mortality. Results: Seventy-six participants (18.1%) died during the follow-up period. The hazard ratios (adjusted for sex, body mass index, cigarette smoking, alcohol intake, and medication use) for mortality across the quartiles of daily step count (lowest to highest) were 1.00 (reference), 0.81 (95%CI, 0.43-1.54), 1.26 (95%CI, 0.70-2.26), and 0.46 (95%CI, 0.22-0.96) (P for trend = 0.149). Participants in the highest quartile had a significantly lower risk of death compared with participants in the lowest quartile. Conclusion: This study suggested that a high daily step count is associated with a lower risk of all-cause mortality in physically independent Japanese elderly people.

DOI： 10.1186/s12889-018-5434-5

Scopus

PubMed

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Authorship：Lead author  

DOI： 10.7600/jpfsm.7.25

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Language：Japanese   Publisher：Japanese Society of Lifelong Sports  

This study aimed to examine the steps per day, physical fitness and functional capacityof independent elderly women ( ≥ 65 years) who attained the target step counts ( ≥ 6000 steps /day) of the Public Health Recommendation of Health Japan 21 (the second term). The participantsincluded 146 elderly women (age : 75 ± 5 years). The participants who performed ≥ 6000 steps /day (73 ± 5 years, n = 83) and < 6000 steps / day (76 ± 5 years, n = 63) were classified into thehigh-step (HS) and low-step (LS) groups, respectively. The participants wore an accelerometer for2 consecutive weeks to measure their daily physical activities.Their functional capacity was thenassessed using the Tokyo Metropolitan Institute of Gerontology Index of Competence (TMIG-IC).The physical fitness tests included handgrip strength, sit and reach, knee extensor strength, legextensor power, stepping, one-leg standing time with eyes open, 10-m maximum walking speed(10MWS) and the Timed Up and Go Test (TUG).The steps / day in the HS group (8536 ± 2135 steps/ day) was significantly higher than that in the LS group (4097 ± 989 steps / day).The leg extensorpower and one-leg standing time with eyes open scores of the HS group were significantly higherin comparison to the LS group. The average number of steps / day was significantly correlated withthe 10MWS and TUG results in the LS group, but not the HS group. The present study suggeststhat the HS group had superior physical fitness, and that mobility gradually declines from a PA levelof approximately 6000 steps / day as the number of steps decrease.

DOI： 10.14838/jjls.14.1

J-GLOBAL

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Other Link： https://www.jstage.jst.go.jp/article/jjls/14/1/14_1/_article/-char/ja

Authorship：Lead author,　Corresponding author   Language：Japanese  

DOI： 10.14838/jjls.14.25

J-GLOBAL

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Other Link： https://www.jstage.jst.go.jp/article/jjls/14/1/14_25/_article/-char/ja

Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：Japanese Society of Lifelong Sports  

Purpose: The purpose of this study was to examine the association between physical fitnessand the cessation of work among members of the Silver Human Resources Center.Methods: The participants included 737 elderly individuals (male, n=458; female, n=279).The components of physical fitness (muscle strength, cardiorespiratory fitness, coordinationability, and flexibility) were measured using self-reported methods. In the present study, thecessation of work was defined as having no work for the past year due to concerns about one＇sown physical fitness. A logistic regression analysis was performed to examine the associationbetween the components of physical fitness and the cessation of work.Results: Forty-seven participants had ceased work according to the abovementioneddefinition. In a model adjusted for sex, age, BMI, and medication use, two of the components ofphysical fitness (muscle strength and cardiorespiratory fitness) were significantly associated withthe cessation of work. In a model that was additionally adjusted for other components of physicalfitness, there were no significant linear relationships between any of the components of physicalfitness and the cessation of work (p for trend ＞ 0.05); however, the participants with mid-levelmuscle strength had a significantly lower odds ratio for the cessation of work (0.34; 95% confidenceinterval, 0.14 - 0.85) in comparison to those with low-level muscle strength (reference).Conclusion: The present study showed that physical fitness, especially muscle strength,was significantly associated with the cessation of work among members of the Silver HumanResources Center.

DOI： 10.14838/jjls.13_2_27

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

Background: Tracking refers to the tendency for an individual to maintain their rank within a group over time. This study longitudinally investigated the 8-year tracking of pedometer-determined physical activity among physically independent elderly Japanese people aged 72 to 80 years. Methods: Steps/day were measured when participants were aged 72 and assessed again after 2, 5, and 8 years. The number of participants with a 2-year follow-up (72 to 74 years) was 177 (101 males, 76 females), with a 5-year follow-up (72 to 77 years) was 183 people (110 males, 73 females), and with an 8-year follow-up (72 to 80 years) was 145 people (91 males, 54 females). Step counts were continuously measured for 1 week in January, April, July, and October during each year of assessment. Results: A high rank correlation coefficient for steps/day exceeding 0.60 was obtained at the 2-, 5- and 8-year follow-up examinations for both males and females. Conclusion: This study suggests that the rank within a group of pedometer-determined steps/day remains stable over up to 8 years in healthy Japanese people aged between 72 to 80 years old.

DOI： 10.1123/jpah.2014-0450

Web of Science

PubMed

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Authorship：Lead author,　Corresponding author  

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Language：Japanese   Publisher：Japanese Society of Lifelong Sports  

The purpose of this study was to reveal the lifestyle of mountain climbers by comparing lifestyles of middle–age female mountain climbers belonging to the Japan Alpine Federation (n=41, age=53.8∓5.0yr) and a control group of women who did not regularly perform any exercise (n=34, age=56.5∓5.4yr). By serving the participants a survey, we collected and date on anthropometric informatics, exercise customs, dietary habits, and lifestyle issues. The study yielded the following four results: •The BMI, abdominal girth, and body fat percentage were significantly lower in the mountain climbers than the control group. •M ountain climber＇s length of walking time in a day is longer than control group. (χ²=20.899,p¬<0.001) • Smoking, Alcohol intake, and sleep patterns were not similar between mountain climbers and the control group. •Mountain climbers had better eating habits than the control group. These results showed that mountain climbers have healthier exercise and eating habits than the control group. As a result mountain climbers keep appropriate lifestyle for mountain climbing.

DOI： 10.14838/jjls.11.13

J-GLOBAL

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Other Link： https://www.jstage.jst.go.jp/article/jjls/11/2/11_13/_article/-char/ja

Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：全国大学体育連合  

CiNii Books

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Authorship：Lead author   Language：Japanese   Publisher：Japanese Society of Lifelong Sports  

DOI： 10.14838/jjls.9.1-2_43

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Authorship：Lead author   Language：Japanese   Publisher：日本肥満学会  

CiNii Books

J-GLOBAL

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Language：Japanese   Publisher：Japanese Society of Lifelong Sports  

The study aimed to characterize the daily physical activity, physical fitness, body composition and plasma metabolite concentration of middle-aged female mountain climbers. The subject of this study were middle-aged female mountain climbers (MC) belonging to the Japan Workers Alpine Federation (n=45, age=63.2±6.5yr), and women (control group) who did not regularly performed any exercise (n=76, age=66.0±4.8yr). In May 2011, each participant completed a physical activity questionnaire, and underwent a examination, anthropometric measurement and blood sampling.The study yielded the following four results:The MC tended to have a higher frequently than a control group. The BMI, waist circumference, and body fat percentage were significantly lower in the MC than the controlgroup.HDL cholesterol was significantly higher in the MC than the control group. The performance of 10-repetition, one-leg standing balance with eyes open and sit up was significantly higher in the MC than the control group. These results showed that habitual physical activity was need by the MC to maintain good physical fitness, body composition, and plasma metabolite concentration.

DOI： 10.14838/jjls.8.2_42

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Authorship：Lead author   Language：Japanese   Publisher：Japanese Society of Lifelong Sports  

Purpose: The purpose of this study was to determine the relationship between daily physical activity and regaining body fat after weight-loss. Methods: The subjects comprised 41 middle-aged females who participated in a 3-month exercise program from 2002 to 2003 and follow-up survey in 2006. Measures of height, body weight, percent body fat, dietary habits, and physical activity (PA) were collected before and after the program and the follow-up survey. PA was measured with accelerometer for 7 consecutive days in free-living conditions. The subjects were divided into two groups, according to the amount of change in percent body fat during after the program until the follow-up survey: one group (Regaining-G) gained more than one percent body fat, while the other (Non regaining-G) gained less than one percent. Results: A two-way (time×group) ANOVA revealed significant interactions for the number of steps per day and the time spent in light and moderate PA. The number of steps per day and the time spent in light and moderate PA showed a decrease in the follow-up period in comparison to after the program period for Regaining-G. On the other hand, there was no difference between the level of these PAs after the program period and the follow-up period for Non regaining-G. Conclusions: The time spent in light and moderate PA may affect the prevention of regaining body fat after weight-loss. This study also suggests that the number of steps per day may be a useful predictor of body fat maintenance after weight-loss.

DOI： 10.14838/jjls.8.2_23

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

Purpose: The purpose of this study was to determine the relationship between 20m shuttle run (20mSRT) performance and a substantial increase in waist circumference (WC) with aging in Japanese middle-aged adults.
Methods: One hundred and fifty-six Japanese middle-aged adults (40-64 yrs; 40 males, 116 females) participated in this study. Baseline data on 20mSRT, height, weight, WC, alcohol habit, smoking habit and the use of medication were collected from 2003 to 2004. Follow-up data on height, weight and WC were collected in 2008. The 20mSRT results were divided into gender-specific quartiles. A logistic regression analysis was used to predict a substantial increase in the WC (5 cm or more) during the follow-up.
Results: During the follow-up, 44 people had a substantial increase in the WC. Independently from sex, age, height (baseline), weight (baseline), WC (baseline), alcohol habit, smoking habit and the use of medication, the highest quartile of 20mSRT was significantly associated with significantly lower odds ratio of a substantial increase in WC (OR: 0.07, 95%CI: 0.01-0.36) in comparison to the lowest quartile of 20mSRT. Furthermore, after additional adjustment for change in weight during follow-up, the highest quartile remained significantly predictive of a substantial increase in the WC, with odds ratio of 0.07 (95%CI: 0.01-0.39).
Conclusions: These results indicate that the 20mSRT performance is a significant predictor of a substantial increase in the WC with aging in Japanese middle-aged adults. (Jpn. J. Phys, Fitness Sports Med. 2010, 59 : 199 similar to 206)

DOI： 10.7600/jspfsm.59.199

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Authorship：Lead author   Language：Japanese   Publisher：日本肥満学会  

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J-GLOBAL

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Authorship：Lead author   Language：Japanese   Publisher：日本肥満学会  

J-GLOBAL

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Authorship：Lead author  

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Authorship：Lead author   Language：Japanese   Publisher：日本肥満学会  

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J-GLOBAL

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

The purpose of this study was to examine the effects of walking 10, 000 steps/day on the body composition, blood pressure, blood biochemical parameters and physical fitness. Sixty-one women, aged 56.0 +/- 5.3yrs (mean SD), participated in a hyperlipemia prevention program. The length of the program was 90-min and it was performed one time per week for 3 months. The program consisted of stretching and aerobic exercise (cycle exercise, walking or aerobic rhythmic gymnastics). The participants were asked to walk 10, 000 steps/day or more during the program. The number of steps and physical activity (PA) were monitored using a single-axis accelerometer during the program. PA was categorized into three activity levels, namely light (L), moderate M and vigorous (V) PA. After 3 months in the program, the participants were divided into two groups according to the average number of steps taken daily during the program : one group (GA) walked more than 10,000steps/day, while the other (GB) walked below 10,000 steps/day. The time spent in LPA, MPA and VPA in GA were significantly longer than in GB (LPA : 79.4 +/- 19.2min VS 58.2 +/- 10.0 min, MPA : 38.5 +/- 9.6min VS 21.6 +/- 6.1 min, VPA :6.3 +/- 4.9 min VS 2.6 +/- 2.0 min, p&lt;0.001). Decreases in the percent body fat (p&lt;0.001), body fat mass (p&lt; 0.001), fasting glucose (p&lt;0.001), hemoglobin Ale (p=0.026), and triglyceride (p=0.036) and an improved performance when balancing on one leg while standing with eyes closed (p=0.027) were found respectively after the program for GA. These findings indicated that GA affected the percent body fat (P=0.036), body fat mass (p=0.040) and fasting glucose (p=0.009). According to a stepwise multiple regression analysis, the time spent in MPA showed a significantly negative correlation with the change in the body fat mass (p=0.025), and the change in the body fat mass showed a significantly positive correlation with the change in the fasting glucose (p&lt; 0.001), hemoglobin Ale (P=0.002) and triglyceride (p&lt;0.001). We thus concluded that walking 10, 000 steps/day resulted in an increased amount of time spent in MPA, and thus leading to decrease in the amount of body fat. This decrease in body fat is also considered to contribute to improvement in the coronary risk factor profiles.

DOI： 10.7600/jspfsm.56.257

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Language：Japanese   Publisher：杏林書院  

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Language：Japanese   Publisher：杏林書院  

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Language：Japanese   Publisher：鹿屋体育大学  

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Language：Japanese   Publisher：National Institute of Fitness and Sports in Kanoya  

CiNii Books

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Language：Japanese   Publisher：National Institute of Fitness and Sports in Kanoya  

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Language：Japanese   Publisher：運動疫学研究会  

CiNii Books

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Language：Japanese   Publisher：日本ウォーキング学会  

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