Maternal leisure time physical activity and infant birth size.
产妇闲暇时间体力活动与婴儿出生大小。
Physical activity takes too much time!
身体活动需要太多的时间！
There's no need to spend time or energy teaching them about physical activity.
没有必要花费时间或精力教他们进行身体活动。
Increase physical activity and reduce time spent in sedentary behaviors.
要加强体育锻炼，减少坐着的时间。
Researchers also tracked time spent walking daily and on physical activity.
研究人员还跟踪调查了他们每日步行和运动的时长。
Researchers also tracked time spent walking daily and on physical activity.
研究人员还跟踪调查了他们每日步行和运动的时长。
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