Department of Pediatrics, University at Buffalo, USA.
J Sci Med Sport. 2012 Jul;15(4):334-40. doi: 10.1016/j.jsams.2011.12.004. Epub 2012 Feb 17.
To determine whether increasing the choice of physical activity options increases the duration and intensity of children's physically active play.
This cross-sectional laboratory study included gender (male and female) and choice group [single toy (no choice), three toys (low choice), five toys (high choice)] as between participant factors.
Boys and girls (n=36, 8-12 y) were stratified, randomly assigned to a choice group that always provided access to each participant's most liked active toy(s), and allowed 60 min of free time. The same sedentary alternatives were freely available to all participants. Physical activity outcomes were measured by accelerometry, heart rate, and direct observation.
The number of active toys the children played with increased (p<0.001) across each choice group. Minutes spent in MPA were greater in the low choice (p<0.05) and high choice (p<0.02) groups than the no choice group. Active playtime was greater (p<0.01) in the low choice (79%) and high choice (95%) groups compared to the no choice group. Girls in the low and high choice groups had greater (p<0.05) percent heart rate reserve when compared to girls in the no choice group. There was no difference in the boys' percent heart rate reserve between the no choice, low choice and high choice groups.
Increasing the choice of active toys increases both the duration and intensity of physically active play, especially in girls.
确定增加身体活动选择是否会增加儿童积极玩耍的时间和强度。
本横断面实验室研究纳入了性别（男、女）和选择组[单一玩具（无选择）、三种玩具（低选择）、五种玩具（高选择）]作为参与者间因素。
男孩和女孩（n=36，8-12 岁）按性别分层，随机分配到选择组，该组始终提供每个参与者最喜欢的活跃玩具，并允许 60 分钟自由时间。所有参与者都可以自由选择同样的久坐替代方式。通过加速度计、心率和直接观察来测量身体活动结果。
孩子们玩的活跃玩具数量在每个选择组中都有所增加（p<0.001）。低选择（p<0.05）和高选择（p<0.02）组的中等到剧烈体力活动时间长于无选择组。与无选择组相比，低选择（79%）和高选择（95%）组的积极玩耍时间更长（p<0.01）。与无选择组相比，低选择和高选择组的女孩心率储备百分比更大（p<0.05）。无选择、低选择和高选择组的男孩心率储备百分比没有差异。
增加活跃玩具的选择可以增加积极玩耍的时间和强度，尤其是在女孩中。
