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。

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Compared with other types of leisure-time physical activity, like formal exercise, which usually requires motivation and sometimes professional instruction, shopping is easier to.

其他的休闲体育活动，如正规的锻炼通常需要动力才能坚持，有时还需要专业指导，相比之下，逛街则更容易进行，也更容易坚持下去。

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Physical activity takes too much time!

身体活动需要太多的时间！

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"We can say that 50 percent of the burden of obesitycan be contributed by having no leisure time physical activity."

VOA: standard.2010.08.10

The federal government is encouraging schools to make more time so children can participate in physical activity.

VOA: standard.2010.03.09

In fact, occupational sitting time is where the epidemiology of physical activity first began, writes one researcher in the British Journal of Sports Medicine.

CNN: Sitting for hours can shave years off life

To provide children with a healthier start, local elected officials commit to helping early care and education program providers incorporate best practices for nutrition, physical activity and screen time into their programs.

WHITEHOUSE: The White House

To date approximately 2, 000 child care professionals and organizations have registered online to implement new criteria for nutrition, physical activity and limiting screen time.

WHITEHOUSE: Our Top Stories