Treuth M S, Figueroa-Colon R, Hunter G R, Weinsier R L, Butte N F, Goran M I
USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA.
Int J Obes Relat Metab Disord. 1998 May;22(5):440-7. doi: 10.1038/sj.ijo.0800605.
To determine whether overweight children have lower physical activity energy expenditure (EE) and fitness levels than non-overweight children.
Twenty-four healthy girls aged 7-10 y were divided into overweight (> 95th percentile weight-for-height) and non-overweight (10-90th percentile) groups. Basal metabolic rate (BMR), sleeping metabolic rate (SMR), 24 h sedentary EE (SEE) and total EE (TEE) were measured by room respiration calorimetry and doubly labelled water. Physical activity EE and physical activity level (PAL) were calculated. Fitness (VO2peak) was measured by a treadmill exercise test.
The overweight group had significantly higher body weight, percent fat, fat mass and fat-free mass (FFM) (P < 0.001). The overweight girls had higher BMR, SMR, SEE and TEE (P < 0.001), but not after adjustment for FFM. Physical activity EE and PAL were not significantly different between groups. After adjusting for FFM or weight, submaximal and peak VO2 were not significantly different between groups.
We conclude that these overweight girls do not have lower physical activity EE or fitness levels than the non-overweight prepubertal girls, however, the rather high body fat of the non-overweight group may have precluded us from finding any differences between groups.
确定超重儿童的身体活动能量消耗（EE）和健康水平是否低于非超重儿童。
将24名7至10岁的健康女孩分为超重组（身高体重超过第95百分位数）和非超重组（身高体重在第10至90百分位数之间）。通过室内呼吸热量测定法和双标水法测量基础代谢率（BMR）、睡眠代谢率（SMR）、24小时久坐能量消耗（SEE）和总能量消耗（TEE）。计算身体活动EE和身体活动水平（PAL）。通过跑步机运动试验测量健康水平（最大摄氧量）。
超重组的体重、体脂百分比、脂肪量和去脂体重（FFM）显著更高（P < 0.001）。超重女孩的BMR、SMR、SEE和TEE更高（P < 0.001），但在根据FFM进行调整后则不然。两组之间的身体活动EE和PAL没有显著差异。在根据FFM或体重进行调整后，两组之间的次最大摄氧量和峰值摄氧量没有显著差异。
我们得出结论，这些超重女孩的身体活动EE或健康水平并不低于非超重的青春期前女孩，然而，非超重组相当高的体脂可能使我们无法发现两组之间的任何差异。
