Mothers who get at least five hours of sleep per day shed more baby weight than those who don’t, according to a new study. Published in the American Journal of Epidemiology, the study examined data on 940 women in Massachusetts. Moms who got less than five hours of sleep were three times as likely as those who slept seven hours to have retained at least 11 pounds of the weight they gained during their pregnancy.  

The study also showed that it was OK if the sleep was split up—it doesn’t have to all come at once—and that quick naps can count towards the five hours.