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Perfect the power nap
Japan
In this on-the-go country, many people take time for a daily 20- to 30-minute nap, says James Maas, PhD, a sleep researcher at Cornell University and the author of Power Sleep. There's increasing evidence that chronic sleep deprivation raises the risk of weight gain. Maas blames two hormones: leptin, which helps the brain sense when you're full, and ghrelin, which triggers hunger. The less sleep you get, the lower your leptin levels-and the higher your ghrelin. 'Many people think they're hungry when they're actually sleepy,' Maas says. 'Instead of a snack, they need some shut-eye.'
<b>Perfect the power nap </b><br><b>Japan </b><br>In this on-the-go country, many people take…