healthmedicinet

Avoiding caffeine is default rule No. 1 for those hoping to improve their sleep habits. But don’t hide your French press just yet. Dr. Sara Mednick, sleep expert at the University of California, Riverside, says that the conventional wisdom is all wrong when it comes to power naps. “Drink some caffeine, then take a nap,” she says. “The caffeine will take effect in 20 to 30 minutes, and [you will naturally] wake you up before you fall into a deep sleep, which prevents grogginess.”