One of the more interesting ideas that has been smoldering and is now gaining momentum is the appreciation of the fact that sleep and sleep disruption do remarkable things to the body - including possibly influencing our weight," says David Rapoport, MD, associate professor and director of the Sleep Medicine Program at the New York University School of Medicine in New York City
At least two dozen studies have documented that people tend to weigh more if they sleep less, says Sanjay Patel, M.D., a researcher at Case Western Reserve University in Cleveland. In a 16-year study of almost 70,000 women, Dr. Patel and his colleagues found that those who slept five hours or less a night were 30 percent more likely to gain 30 - plus pounds than those who got more rest. In fact, some experts believe lack of sleep is one reason for America’s obesity epidemic. The average woman gets six hours and 40 minutes of sleep most nights, according to the National Sleep Foundation - much less than the seven and a half hour minimum our experts say healthy women need.