閉経後中高年女性の基礎代謝量に及ぼす身体組成の影響

概要

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The basal metabolic rate (BMR) of 70 postmenopausal women (age : 60.6±4.2 yrs., height : 154.9±5.2cm, body weight (BW) : 52.7±6.2kg ; mean± SD) was evaluated in relation to body composition (body fat mass (FM) : 17.3±3.9kg, lean body mass (LBM) : 35.3±3.6kg). BMR was 1,148±126kcal/dav, 21.9±2.2kca/kgBW/day, 32.7±3.2kcal/kgLBM/day in all subjects. BMR (kcal/day) significantly correlated with BW (r=635, p<0.001) and LBM (r=598, p<0.001) When divided into two groups, (lower %fat group (LF ; <35%fat) and higher %fat group (HF ; ≧35%fat)). BW and FM were significantly higher in HF than in LF (BW : 56.6±6.4 vs 51.0±5.3kg, FM : 21.7±2.8 vs 15.5±2.7kg, p<0.001, respectively), No difference was observed in LBM between the two groups (34.9±3.9 vs 35.5±3.5kg). BMR (kcal/kgBW/day) was lower in HF than in LF (21.0±1.8 vs 22.3±2.3, p<0.05), but HF group had higher BMR in terms of kcal/kgLBM/day than LF (34.0±3.1 vs 32.1±3.1, p<0.05). Multiple regression analysis was performed to predict RMR. A single predictor LBM and a pair of predictors LBM and FM explained 35.7% and 42.7% of the variance of BMR. This study suggested that a decrease in LBM is a major factor in affecting the reduction of BMR in postmenopausal women, whereas FM gained after menopause could be considered to have metabolic activity related to BMR.
日本体力医学会の論文
2003-04-01