A power nap is a short sleep (10-20 minutes) taken during the day to boost alertness and performance. It's one of the most effective, free, and immediate ways to recharge your brain. Here's what the science says and how to do it right.
A NASA study found that a 26-minute nap improved pilot alertness by 54% and performance by 34%. Even a 10-minute nap significantly reduces subjective sleepiness and improves reaction time.
A study in Nature Neuroscience found that a 60-90 minute nap containing slow-wave sleep improved memory consolidation. Shorter naps (20 minutes) also help with procedural memory (learning new skills).
REM sleep enhances creative problem-solving. While 20-minute naps don't usually include REM, they do reduce the cognitive fatigue that blocks creative thinking.
Napping reduces cortisol levels and activates the parasympathetic nervous system. A study in the Journal of Clinical Endocrinology and Metabolism found that a 30-minute nap reversed the hormonal effects of a bad night's sleep.
Napping improves emotional regulation and reduces irritability. If you're feeling cranky after a poor night's sleep, a short nap can help restore your emotional balance.
For maximum alertness, drink a cup of coffee right before your 20-minute nap. Caffeine takes 20 minutes to kick in, so you wake up just as it's hitting. Studies show this combination is more effective than either coffee or napping alone.
Time your power nap with our free Nap Calculator.
Yes. Put your head on your arms, set a 20-minute alarm, and close your eyes. It's not as comfortable as a couch, but it works. A small pillow or folded jacket improves comfort.
One or two is fine, before 3 PM. If you need more than two, you're probably not getting enough nighttime sleep. Fix the root cause rather than relying on naps.
For alertness, they're about equal. For memory and mood, the nap is better. For immediate effect, coffee is faster. The combination (coffee nap) is best of all.