Department of Exercise, Nutrition & Health Sciences, University of Bristol, Bristol, UK.
Int J Behav Nutr Phys Act. 2009 Jan 7;6:2. doi: 10.1186/1479-5868-6-2.
Children's independent mobility has fallen in recent years and may in part explain reported declines in physical activity in young people. This cross-sectional study investigated whether independent mobility in boys and girls was related to objectively measured physical activity.
Thirteen hundred and seven 10-11 year old boys and girls from 23 schools in a large UK city took part. Measures included objectively recorded physical activity (accelerometer (Actigraph GT1M)), height (m) and weight (kg), a newly developed scale for local (Local-IM) and area independent mobility (Area-IM), minutes of daylight after school, level of neighbourhood deprivation and pubertal status.
Boys had greater Local-IM, Area-IM and physical activity (average weekday and weekend counts per minute) compared to girls. In linear regression analyses (adjusting for minutes of daylight after school, neighbourhood deprivation, pubertal status and body mass index) higher scores for Local-IM and Area-IM were significantly (p < 0.01) related to higher levels of physical activity on weekdays for boys and girls. For weekend physical activity, only Local-IM in girls remained significant (p < 0.05) in the model.
Independent mobility appears to be an important independent correlate of weekday physical activity for both boys and girls.
近年来，儿童的独立出行能力有所下降，这可能在一定程度上解释了年轻人身体活动减少的现象。本横断面研究旨在调查男孩和女孩的独立出行能力是否与身体活动的客观测量结果相关。
来自英国一个大城市 23 所学校的 1307 名 10-11 岁男孩和女孩参与了本研究。测量指标包括：客观记录的身体活动（加速度计（Actigraph GT1M））、身高（m）和体重（kg）、新开发的本地（Local-IM）和区域独立出行（Area-IM）量表、放学后的日照时间、邻里剥夺程度和青春期状况。
与女孩相比，男孩的本地独立出行、区域独立出行和身体活动（平均工作日和周末每分钟的活动计数）水平更高。在线性回归分析中（调整了放学后的日照时间、邻里剥夺程度、青春期状况和体重指数），本地独立出行和区域独立出行得分较高与男孩和女孩的工作日身体活动水平显著相关（p<0.01）。对于周末身体活动，只有女孩的本地独立出行在模型中仍然显著（p<0.05）。
独立出行似乎是男孩和女孩工作日身体活动的一个重要独立相关因素。
