How Naps Affect Sleep
You’ve probably heard that naps can hamper your ability to fall asleep later in the day. That’s true, but only to a certain extent. Shorter naps up to about 30 minutes help you stay alert without making you groggy or affecting your sleep patterns. That’s because you stay in light sleep mode. Once you cross into deep sleep or REM sleep after the 30-minute mark, you’ll probably feel groggy when you wake up and may have trouble sleeping later. You can try out different nap lengths and find the optimal one that restores without hurting later sleep.