Maturity-Related Differences in Physical Activity Among 10-to 12-Year-Old Girls
Maturity-Related Differences in Physical Activity Among 10-to 12-Year-Old Girls
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DOI：
10.1002/ajhb.20905
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发表时间：
2010-01-01
影响因子：
2.9
通讯作者：
Walsh, David
中科院分区：
文献类型：
--
作者：
Drenowatz, Clemens;Eisenmann, Joey C.;Walsh, David
除了环境和心理社会因素解释青少年时期身体活动水平的变化外，一些证据表明，生物过程参与调节习惯性日常身体活动和能量消耗。本研究旨在探讨生理成熟状态对体力活动的影响。在268名年龄为9.5至11.5岁的女孩中，按年龄、站高、坐高和体重进行了横断面测量。根据估计的峰高流速年龄（estAPHV）创建生物成熟度组（早期、平均、晚期）。用计步器（Yamax Digiwalker SW-200）在7天时间内测定习惯性身体活动。通过ANCOVA检查了成熟组之间的步数/天差异，分别控制佩戴计步器的时间，腿长和体重。平均步数计步数/天为10，822 +/-2，639。正如预期的那样，身体大小因成熟状态而异（例如，早>平均>晚）。显着的成熟组的差异，发现早熟女孩表现出较低的活动水平相比，平均或晚熟。在控制了佩戴计步器的时间和腿长后，这些差异仍然存在;然而，当控制体重时，差异不再显著。结果表明，生物成熟状态影响10至12岁女孩的身体活动水平，但这种关系并不独立于体重。需要进一步的研究来建立肥胖、生物成熟和青春期能量消耗之间复杂的相互关系。奈恩. J.哈姆。22：18-22，2010. (C)2009 Wiley-Liss，Inc.
Besides environmental and psycho-social factors explaining the variation in physical activity levels during adolescence, some evidence suggests that biological processes are involved in regulating habitual daily physical activity and energy expenditure. The purpose of this study was to examine the influence of biological maturity status on physical activity. Chronological age, standing height, sitting height, and body mass were measured cross-sectionally in 268 girls, aged 9.5 to 11.5 years. Biological maturity groups (Early, Average, Late) were created according to estimated age at peak-height-velocity (estAPHV). Habitual physical activity was determined with a pedometer (Yamax Digiwalker SW-200) over a 7-day period. Differences in steps/day across maturity groups were examined by ANCOVA, controlling separately for time the pedometer was worn, leg length, and body mass. Mean pedometer steps/day was 10,822 +/- 2,639. As expected, body size varied by maturity status (e.g., early > average > late). Significant maturity group differences were found with early maturing girls showing lower activity levels compared to average or late maturers. These differences remained after controlling for time the pedometer was worn and leg length; however, the differences were no longer significant when controlling for body mass. The results suggest that biological maturity status influences physical activity levels in girls between 10 and 12 years of age but the relationship is not independent of body mass. Further research is needed to establish the complex inter-relationships among adiposity, biological maturation, and energy expenditure during puberty. Ain. J. Hum. Biol. 22:18-22, 2010. (C) 2009 Wiley-Liss, Inc.