Developmental changes in energy expenditure and physical activity in children: Evidence for a decline in physical activity in girls before puberty
Developmental changes in energy expenditure and physical activity in children: Evidence for a decline in physical activity in girls before puberty
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DOI：
10.1542/peds.101.5.887
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发表时间：
1998-05-01
期刊：
影响因子：
8
通讯作者：
Johnson, RK
中科院分区：
文献类型：
--
作者：
Goran, MI;Gover, BA;Johnson, RK
客观的。检查男孩和女孩青春期前生长期间能量消耗和体力活动的个体变化。方法。在 5 年内，对 11 名男孩（基线为 5.3 +/- 0.9 岁）和 11 名女孩（基线为 5.5 +/- 0.9 岁）的总能量消耗 (TEE)、静息能量消耗、体力活动相关能量消耗、报告的体力活动以及脂肪和去脂体重进行了 3 次测量。结果。四年来男孩和女孩的脂肪（大约 6 公斤）和去脂体重（大约 10 公斤）以及静息能量消耗（大约 200 kcal/天）的增加相似。在男孩中，TEE 在每个测量年份都会增加，而在女孩中，从 5.5 岁（1365 +/- 330 kcal/天）到 6.5 岁（1815 +/- 392 kcal/天）最初增加；然而，到 9.5 岁时，TEE 显着降低（1608 +/- 284 kcal/天），但能量摄入没有变化。 TEE 随时间变化的性别差异可以通过 6.5 至 9.5 岁女孩的体力活动（千卡/天和小时/周）减少 50% 来解释。结论。这些数据表明，青春期前能量消耗的发育变化存在性别二态性，女孩通过显着减少体力活动来实现能量消耗的节约。
Objective. To examine individual changes in energy expenditure and physical activity during prepubertal growth in boys and girls.Methods. Total energy expenditure (TEE), resting energy expenditure, physical activity-related energy expenditure, reported physical activity, and fat and fat-free mass were measured three times over 5 years in 11 boys (5.3 +/- 0.9 years at baseline) and 11 girls (5.5 +/- 0.9 years at baseline).Results. Four-year increases in fat (similar to 6 kg) and fat-free mass (similar to 10 kg) and resting energy expenditure (similar to 200 kcal/day) were similar in boys and girls. In boys, TEE increased at each measurement year, whereas in girls, there was an initial increase from age 5.5 (1365 +/- 330 kcal/day) to age 6.5 (1815 +/- 392 kcal/day); however, by age 9.5, TEE was reduced significantly (1608 +/- 284 kcal/day) with no change in energy intake. The gender difference in TEE changes over time was explained by a 50% reduction in physical activity (kcal/day and hours/week) in girls between the ages of 6.5 and 9.5.Conclusions. These data suggest a gender dimorphism in the developmental changes in energy expenditure before adolescence, with a conservation of energy use in girls achieved through a marked reduction in physical activity.