TOTAL ENERGY-EXPENDITURE AND SPONTANEOUS ACTIVITY IN RELATION TO TRAINING IN OBESE BOYS

被引:107
作者
BLAAK, EE [1 ]
WESTERTERP, KR [1 ]
BAROR, O [1 ]
WOUTERS, LJM [1 ]
SARIS, WHM [1 ]
机构
[1] MCMASTER UNIV,HAMILTON L8S 4L8,ONTARIO,CANADA
关键词
ENERGY EXPENDITURE; SPONTANEOUS ACTIVITY; TRAINING; CHILDREN; DOUBLY LABELED WATER; OBESITY;
D O I
10.1093/ajcn/55.4.777
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Obese boys [n = 10, aged 10-11 y, average percent body fat (%BF) 32.4] were given a regimented training program (4 wk, 5 1-h sessions, 45 min cycling/wk at 50-60% of predetermined VO2max) to investigate whether they modify their energy expenditure by reducing or augmenting their spontaneous physical activities. No change was observed in mean weight (52.7 vs 52.9 kg), %BF based on H-2- and O-18-dilution and densitometry (32.4 vs 31.7), sleeping metabolic rate (5.83 vs 5.68 MJ/24 h), and spontaneous activity by heart rate recording (percent time of light intensity: 85.3 vs 83.6; medium: 11.2 vs 12.4; and heavy: 3.5 vs 3.9) and activity questionnaires (861 vs 821 min physical activity/wk). There was a 12% increase in average daily metabolic rate by doubly labeled water, half of which can be explained by the energy cost of training and the rest by an increase in energy expenditure outside the training hour. In conclusion, training leads to an appreciable augmentation in the overall energy expenditure of obese children, even with a lack of change in spontaneous physical activity.
引用
收藏
页码:777 / 782
页数:6
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