Think of creative ways to stay active outdoors. Hiking, biking, parks, whatever. You don't have to go to the gym to get activity. It holds no monopoly on exercise and activity.

考虑一些创造性的途径让自己在室外保持活跃，登山，骑自行车，逛公园，无论什么，你不一定要到健身房进行锻炼，锻炼和活动没有规定的场所。

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Do aerobic exercise for a minimum of four days per week, 30 minutes at a time. Some examples of aerobic exercise include running, biking and swimming.

每周至少做四次有氧锻炼，例如慢跑、骑车和游泳，每次30分钟。

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Suggest exercise as a way to boost her endorphins. If she's home for the summer, you can join her at a gym or in biking around the neighborhood.

建议使用锻炼的方法来替她打气。如果她回家度暑假，你可以陪她一起去体育馆或者在家周围骑自行车。

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The 2008 Physical Activity Guidelines for Americans released by the Department of Health and Human Services recommends that adults age 18 to 64 engage in at least 2.5 hours of moderate-intensity aerobic exercise (brisk walking, biking) or an hour and 15 minutes of vigorous activity (like running) each week.

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