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Miyatake N.,Kagawa University | Numata T.,Okayama Southern Institute of Health | Murakami H.,National Institute of Health and Nutrition | Kawakami R.,National Institute of Health and Nutrition | And 3 more authors.
Environmental Health and Preventive Medicine | Year: 2014

Objective: The aim of this study was to investigate the link between circulating adiponectin levels and peak oxygen uptake and/or physical activity in Japanese. Methods: A total of 528 subjects (188 men and 340 women) were enrolled in this cross-sectional study. Circulating adiponectin levels, physical activity measured by tri-axial accelerometers, peak oxygen uptake and metabolic risk parameters were evaluated. We also assessed anthropometric factors, blood pressure, blood examinations and energy intake. Results: Circulating adiponectin levels were 6.7 ± 3.0 μg/mL in men and 11.0 ± 4.9 μg/mL in women. Circulating adiponectin levels were positively correlated with physical fitness after adjusting for age, physical activity evaluated by ∑ [metabolic equivalents x h per week (METs h/w)], cigarette smoking habit and energy intake in both sexes. However, these associations were attenuated further after adjusting for body mass index including other confounding factors, especially in men. However, circulating adiponectin levels were not associated with physical activity in either sex. Conclusion: Circulating adiponectin levels were associated with peak oxygen uptake rather than physical activity. © 2014 The Japanese Society for Hygiene. Source


Saito T.,Okayama Southern Institute of Health | Saito T.,Kagawa University | Miyatake N.,Kagawa University | Nishii K.,Okayama Health Foundation Hospital
Environmental Health and Preventive Medicine | Year: 2015

Objective: To investigate the link between cigarette smoking and one leg with eyes closed balance in Japanese men. Subjects and methods: We used data from 4224 Japanese men, aged 43.3 ± 13.9 years, in this cross-sectional study. Balance, such as one leg with eyes closed balance was measured. In addition, cigarette smoking habits were obtained by well-trained medical staff. The effect of cigarette smoking on one leg with eye closed balance was evaluated. Results: A total of 1613 men (38.2 %) had smoking habit and 1471 men (34.8 %) regularly exercised. Age-related changes in one leg with eyes closed balance were noted. One leg with eyes closed balance in subjects with cigarette smoking (30.9 ± 31.8 s) was significantly lower than those in subjects without cigarette smoking (32.4 ± 33.5 s) even after adjusting for confounding factors i.e. age, body weight and exercise habits. Conclusion: Cigarette smoking might be associated with one leg with eyes closed balance in Japanese men. © 2015, The Japanese Society for Hygiene. Source


Cao Z.-B.,National Institute of Health and Nutrition | Cao Z.-B.,Waseda University | Miyatake N.,Okayama Southern Institute of Health | Higuchi M.,Waseda University | And 2 more authors.
European Journal of Applied Physiology | Year: 2010

The present study investigated the use of the accelerometer-determined physical activity (PA) variables as the objective PA variables for estimating V̇O2max in Japanese adult men. One hundred and twenty-seven Japanese adult men aged from 20 to 69 years were recruited as subjects of the present study. Maximal oxygen uptake (V̇O2max) was measured with a maximal incremental test on a bicycle ergometer. Daily step counts (SC) and the amount spent in moderate to vigorous PA (MVPA) and vigorous PA (VPA) were measured using accelerometer-based activity monitors worn at the waist for seven consecutive days. The non-exercise models were derived using hierarchical linear regression analysis, and cross-validated using two separate cross-validation procedures. SC, MVPA, and VPA were significantly related to V̇O2max (partial correlation coefficient r = 0.58, r = 0.42, and r = 0.51, respectively) after adjusting for age. Two models were developed by multiple regression to estimate V̇O2max using data of age, SC, VPA, and either BMI (the coefficient of determination (R2) = 0.71, standard error of estimate (SEE) = 4.2 ml kg-1 min-1), or waist circumference (R2 = 0.74, SEE = 3.9 ml kg-1 min -1). All regression models demonstrated a high level of cross-validity supported by the minor shrinkage of R2 and increment of SEE in the PRESS procedure, and by small constant errors for subgroups of age, SC, and V̇O2max: This study demonstrated that combining SC with VPA, but not with MVPA, was useful in predicting V̇O2max variance and improved the ability of the regression models to accurately predict V̇O2max. © Springer-Verlag 2010. Source


Miyatake N.,Kagawa University | Shikata K.,Okayama University | Shikata K.,Okayama University of Science | Makino H.,Okayama University of Science | Numata T.,Okayama Southern Institute of Health
Acta Medica Okayama | Year: 2011

The link between changes in a subject's metabolic syndrome components and his estimated glomerular filtration rate (eGFR) was evaluated in healthy Japanese men. We used data from 120 Japanese men (45.5 ± 8.4 years) with a 1-year follow up. eGFR was defined by a new equation developed for Japan. There were no significant differences in eGFR between men with and without metabolic syndrome components at baseline. Subjects were given advice for dietary and lifestyle improvement. At the 1-year follow up, almost all metabolic syndrome components were significantly improved. However, eGFR was significantly decreased. The changes in eGFR were weakly correlated with abdominal circumference (r= -0.232, p = 0.0106). A decrease in abdominal circumference may be associated with improving eGFR in Japanese men. Source


Miyatake N.,Kagawa University | Shikata K.,Okayama University of Science | Makino H.,Okayama University of Science | Numata T.,Okayama Southern Institute of Health
Acta Medica Okayama | Year: 2010

The link between changes in a subject's metabolic syndrome components and her estimated glomerular filtration rate (eGFR) was evaluated in healthy Japanese women. We used data for 53 Japanese women (46.0 ± 10.9 years) with a 1-year follow up. eGFR was defined by a new equation developed for Japan. There were no significant relationships between eGFR and clinical parameters at baseline. Subjects were given advice for dietary and lifestyle improvement. At the 1-year follow up, eGFR was significantly increased. In addition, changes in eGFR were weakly correlated with systolic blood pressure (r = -0.306, p = 0.0260). A decrease in systolic blood pressure may be associated with improving eGFR in Japanese women. © 2010 by Okayama University Medical School. Source

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