YOU'LL GAIN WEIGHT > 영국생활정보

Studies show that people who sleep less than seven hours a day tend to gain more weight and have a higher risk of becoming obese than those who get more time in bed. This is because the bodies of sleep-deprived people have lower levels of leptin, a chemical that makes you feel full once you’ve eaten, as well as higher levels of ghrelin, a hormone that stimulates hunger.

This effect is surprisingly fast acting. For example, one study found that one week of sleeping about five hours a night led participants to gain an average of two pounds in weight.