It'll Weaken the Pretzel Dog's Siren Song
Cheat yourself of two or more hours of sleep each night this workweek and you may find yourself two pounds heavier by Saturday—as volunteers did in a study at the University of Colorado at Boulder. Eating more is one explanation. The other is what you'll eat: pasta, cake, bread—anything high in carbs—especially after dinner. Even a night or two of short sleep boosts the hormone ghrelin, which stimulates the appetite, and decreases leptin, which suppresses it.