Muscle strength at young age is not associated with future development of type 2 diabetes in Japanese male athletes

Someya, Yuki; Tamura, Yasuaki; Kohmura, Yoshimitsu; Aoki, Kazuhiro; Kawai, Sachio; Daida, Hiroyuki

doi:10.7600/jpfsm.6.167

Cited by 7 publications

(18 citation statements)

References 22 publications

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“…The Juntendo University Alumni Study included male alumni of the Physical Education School of Juntendo University. In this cohort, we demonstrated previously that association between physical fitness and physical characteristics, such as cardiorespiratory fitness, at a young age and future disease [ 18 – 20 ]. The majority of the study subjects engaged in college sports clubs, such as track and field, gymnastics, soccer, and judo, and participated in training for competitions in their respective sport, and were competitive athletes at least while attending university.…”

Section: Methodsmentioning

confidence: 83%

“…Finally, recall bias was possible because the questionnaire was cross-sectional and participants needed to recall their medical background. However, our previous studies have used the same method[ 18 – 20 ] and established the validity of the self-reports examination by re-examination[ 31 ]. In addition, in Japan, most people undergo free medical screening by a physician at least once annually at work or school.…”

Section: Discussionmentioning

confidence: 99%

“…In the survey, alumni were asked about their medical history whether they had ever been diagnosed with any disease, including hypertension, by a physician after graduation from college. Alumni were also asked about their current life-style, such as exercise, diet and smoking habits [ 18 – 20 ].…”

Section: Methodsmentioning

confidence: 99%

“…In the present study, we hypothesized that the BMI at young age is associated with the development of hypertension later in life. The study was historical cohort study of the Juntendo University Alumni Study, subjects were also participated in a similar study published previously by our group [ 18 – 20 ]. We used standardized physical examination data of the alumni recorded when they were college students, and medical examination of self-administered questionnaires at follow-up investigation to test the study hypothesis.…”

Section: Introductionmentioning

confidence: 99%

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Slightly increased BMI at young age is a risk factor for future hypertension in Japanese men

et al. 2018

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BackgroundHypertension is developed easily in Asian adults with normal body mass index (BMI) (~23 kg/m2), compared with other ethnicities with similar BMI. This study tested the hypothesis that slightly increased BMI at young age is a risk factor for future hypertension in Japanese men by historical cohort study.MethodsThe study participants were 636 male alumni of the physical education school. They had available data on their physical examination at college age and follow-up investigation between 2007 and 2011. The participants were categorized into six categories: BMI at college age of <20.0 kg/m2, 20.0–21.0kg/m2, 21.0–22.0kg/m2, 22.0–23.0kg/m2, 23.0–24.0kg/m2, and ≥24.0kg/m2, and the incidence of hypertension was compared.ResultsThis study covered 27-year follow-up period (interquartile range: IQR: 23–31) which included 17,059 person-years of observation. Subjects were 22 (22–22) years old at graduated college, and 49 (45–53) years old at first follow-up investigation. During the period, 120 men developed hypertension. The prevalence rates of hypertension for lowest to highest BMI categories were 9.4%, 14.6%, 16.1%, 17.5%, 30.3%, and 29.3%, respectively (p<0.001 for trend), and their hazard ratios were 1.00 (reference), 1.80 (95%CI: 0.65–4.94), 2.17 (0.83–5.64), 2.29 (0.89–5.92), 3.60 (1.37–9.47) and 4.72 (1.78–12.48), respectively (p<0.001 for trend). This trend was similar after adjustment for age, year of graduation, smoking, current exercise status and current dietary intake.ConclusionSlightly increased BMI at young age is a risk factor for future hypertension in Japanese men.

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Section: Methodsmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Slightly increased BMI at young age is a risk factor for future hypertension in Japanese men

et al. 2018

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“…The anthropometric, physical tness tests and motor ability tests are implemented once per year at the university over the four years of university studies. The J-Fit Study is a project that uses the accumulated 50 years of data collected as indicated above for research into the association between physical tness, motor ability at a young age and future diseases, such as diabetes, type 2 diabetes, and hypertension [15][16][17][18]. In the present study, we used data obtained from tests results of subjects in their fourth year at university.…”

Section: Study Design and Populationmentioning

confidence: 99%

Association of physical fitness and motor ability at young age with locomotive syndrome risk in middle-aged and older men: J-Fit+ Study

Shen

Suzuki

Kohmura

et al. 2020

Preprint

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Background Physical fitness and motor ability are associated with the incidence of locomotive syndrome (LS) in the elderly. The relationship between physical fitness and motor ability at a young age and LS risk in later life remains to be clarified. This study examined the association between physical fitness and motor ability among university students and their risk of LS in middle and old age. Methods The participants were 231 male alumni aged 48–65 years of the Department of Physical Education of a university in Japan. Physical fitness and motor ability test results during their fourth year of university were used. Physical fitness tests included side-step test, vertical jump tests, back muscle, grip strength, trunk lift, standing trunk flexion, and step-test. Motor ability was tested using the 50-meter, 1,500-meter run, running long jump, hand-ball throw, and pull-up test. LS risk was assessed using a seven-question standardized self-administered Loco-check questionnaire. Participants were divided into three groups (low, medium, and high) based on physical fitness and motor ability test results at young age and the LS risk was assessed at older age across the three groups using the Cox proportional hazards models. Results From the 2017 follow-up questionnaires, LS risk was suspected in 31 (13.4%) participants. Higher performance on the side-step test was associated with reduced risk of LS (hazard ratio 0.22; 95% confidence interval, 0.058–0.798, P=0.022). Conclusions Good agility (side-step test) at a young age may reduce future risk of LS among middle-aged and older men.

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Secular trends in the grip strength and body mass index of sport university students between 1973 and 2016: J-Fit＋study

Kidokoro

Kohmura

Fuku

et al. 2020

Journal of Exercise Science & Fitness

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Background/ObjectiveSport university students are a unique population because they usually have a strong sport background since early childhood. In this study, we aimed to examine secular trends in grip strength of male, first-year sport university students in comparison with the general population between 1973 and 2016.MethodsExisting data on the grip strength of 6,308 sport university students aged 18 years were examined. The data were obtained from the Juntendo Fitness Plus Study, a study of the Department of Physical Education/Health and Sports Science of Juntendo University. For reference, age- and sex-matched data (18 years old, male) on the grip strength were obtained from a national database.ResultsCompared with the general population, the sport university students had greater body mass index and stronger grip strength at all times.ConclusionsThe grip strength of sport university students significantly declined between the 1980s and 1990s, and it has plateaued since 2000, albeit at low levels. Compared with the peak performance of sport university students in 1984, the grip strength of students in 2016 was significantly lower by 8.1 kg. The downward trends were also confirmed in the general population during the same periods. In conclusion, the grip strength of sport university students has significantly declined over the last few decades.

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Muscle strength at young age is not associated with future development of type 2 diabetes in Japanese male athletes

Cited by 7 publications

References 22 publications

Slightly increased BMI at young age is a risk factor for future hypertension in Japanese men

Slightly increased BMI at young age is a risk factor for future hypertension in Japanese men

Association of physical fitness and motor ability at young age with locomotive syndrome risk in middle-aged and older men: J-Fit+ Study

Secular trends in the grip strength and body mass index of sport university students between 1973 and 2016: J-Fit＋study

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