Wickel Eric E, Eisenmann Joey C, Welk Gregory J
Dept of Exercise and Sport Science, University of Tulsa, Tulsa, OK, USA.
J Phys Act Health. 2009 Sep;6(5):597-605. doi: 10.1123/jpah.6.5.597.
This study compared physical activity levels among early, average, and late maturing boys and girls.
Physical activity was assessed with an Actigraph accelerometer in 161 (76 boys, 85 girls) 9 to 14 year olds over 7 consecutive days. Anthropometric variables were measured and the maturity offset (ie, years from peak height velocity) was predicted. Biological maturity groups (early, average, and late) were created based on the mean estimated age at peak height velocity for boys and girls separately.
Levels of moderate-to-vigorous physical activity (MVPA) were similar between early, average, and late maturing boys and girls after adjusting for differences in chronological age. Levels of MVPA progressively declined across chronological age in boys and girls (P < .001) and gender differences existed at 10-, 12-, and 13-years, with boys having higher levels than girls (P < .05). When aligned according to biological age, gender-related differences in MVPA did not exist.
Within this sample of 9 to 14 year old boys and girls, there were no significant differences in MVPA among early, average, and late maturing individuals.
本研究比较了早熟、发育中等和晚熟男孩与女孩的身体活动水平。
使用活动记录仪加速度计对161名（76名男孩，85名女孩）9至14岁的儿童进行连续7天的身体活动评估。测量人体测量学变量并预测成熟偏移（即距身高增长峰值速度的年数）。根据男孩和女孩各自身高增长峰值速度的平均估计年龄分别创建生物成熟组（早熟、发育中等和晚熟）。
在调整了实足年龄差异后，早熟、发育中等和晚熟男孩与女孩的中等到剧烈身体活动（MVPA）水平相似。男孩和女孩的MVPA水平随实足年龄逐渐下降（P <.001），在10岁、12岁和13岁时存在性别差异，男孩的水平高于女孩（P <.05）。根据生物年龄进行比对时，MVPA不存在性别相关差异。
在这个9至14岁男孩和女孩的样本中，早熟、发育中等和晚熟个体的MVPA没有显著差异。
