How Long Should a Nap Be? Sleep Experts Reveal the Ideal Length

Timing is everything when it comes to a midday snooze. According to sleep specialists, a few simple adjustments can make the difference between feeling energized and feeling foggy.

Everyone enjoys a little daytime snooze every once in a while. Naps are a great way to recharge when you're feeling a bit tired, and when done right, they can be the perfect pick-me-up, possibly boosting both productivity and energy levels.

A girl napping on her couch with her dog | Source: Getty Images

But when done wrong, napping can wreak havoc on your sleep schedule. Ever settled in for a quick 45-minute nap, only to wake up hours later with no idea what day it is? Your limbs feel like lead, your mind is foggy, and you feel anything but rested.

Experts say it all comes down to the length of your nap. While naps are generally good for you, sleeping too long or too late in the day can cause trouble. The main offender? Sleep inertia.

"Sleep inertia is when the brain wants to keep sleeping and complete a full sleep cycle," said Dr. Cynthia Bodkin, a sleep medicine physician at IU Health. "How strong the sleep inertia is depends on how sleep-deprived one is."

A woman waking up groggy from a nap | Source: Getty Images

Genetics can also influence how hard sleep inertia hits you. Another frequent problem for those battling post-nap grogginess is that they simply stay asleep longer than they should.

"The ideal length for napping typically is about 20 minutes," said Dr. Alison Kole, director of Outpatient Sleep Services at Summit Medical Group. "Longer naps tend to leave people sleepier, in part because the further you go into a sleep cycle the more likely you are to hit deep sleep."

A man napping on his couch | Source: Getty Images

If the grogginess just won't let up, these tips can help you perfect your napping routine and wake up feeling refreshed and ready to take on the day:

• Limit your nap to 20 to 30 minutes. Most sleep specialists suggest capping your snooze at around 20 minutes, although some say 30 minutes works just as well.
• Don't count on a nap to replace a good night's sleep. In fact, it could make drifting off at bedtime even harder, dragging out the cycle of sleep deprivation.
• Schedule your naps for early afternoon, between noon and 2 p.m. That familiar midday dip in energy is completely natural, and it's the best window for a restorative nap, unlike evening naps, which can throw your sleep schedule off track.
• Ask yourself whether you really need a nap. Because naps are such a simple pleasure, you might never have questioned whether you truly need one. If you settle in for a quick rest and just can't drift off, chances are you didn't need it to begin with.
• Always set an alarm. An alarm is key to hitting that sweet spot for nap length. Aim for no more than 30 minutes to keep from sinking into deep sleep.
• Choose a cool, quiet spot to rest. Noise levels and room temperature can both influence how well you nap. Experts suggest dozing in a calm, peaceful space kept at a comfortable temperature.

A man napping on a porch with a book | Source: Getty Images

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With a little planning, napping can go from a groggy gamble to a reliable energy boost. Keep it short, time it right, and set the scene for rest, and you'll be well on your way to waking up refreshed instead of wondering where the afternoon went.