How long should a power nap be?

Around twenty minutes. This keeps you in lighter sleep stages and produces alertness without the heavy grogginess of waking from deep sleep.

Why do I feel worse after a long nap?

Because you woke during deep sleep, which begins roughly half an hour in. The resulting sleep inertia can last twenty minutes or more and is worse than not napping at all.

When is the best time to nap?

Early afternoon, which matches the natural dip in alertness and is far enough from bedtime not to interfere with sleeping at night.

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Power Nap Timer

Quick Energy Boost

Set your nap duration

Nap Duration (minutes)

Power Nap Benefits

• 10-20 min: Quick energy boost, improved alertness
• 20-30 min: Enhanced memory and creativity
• 60-90 min: Full sleep cycle, best for learning

A nap timer set to the short window that refreshes without leaving you groggy, with a gentle wake at the end.

Length is what determines whether a nap helps or hurts. Around twenty minutes keeps you in light sleep and produces alertness; waking from deep sleep, which begins after roughly half an hour, produces the heavy grogginess known as sleep inertia.

How to use it

Set the timer for around twenty minutes.
Lie down somewhere quiet and dim if you can.
Get up when the timer sounds rather than drifting back off.

Napping well

Keep naps to about twenty minutes, or extend to a full ninety-minute cycle. The window between is where grogginess is worst.
Nap in the early afternoon, which aligns with the natural dip in alertness and interferes least with night sleep.
Avoid napping late in the day, which reduces sleep pressure and makes falling asleep at night harder.
Some people drink a coffee immediately before a short nap, so the caffeine takes effect as they wake. The timing works out reasonably well.
Get up promptly when the timer sounds. Drifting back to sleep is what produces the grogginess the short window is designed to avoid.

A note on scope

These are general wellbeing exercises, not medical advice. If you have a health condition, are recovering from injury, or find that an exercise causes pain rather than mild discomfort, speak to a qualified professional rather than working through it.

Frequently asked questions

How long should a power nap be?: Around twenty minutes. This keeps you in lighter sleep stages and produces alertness without the heavy grogginess of waking from deep sleep.
Why do I feel worse after a long nap?: Because you woke during deep sleep, which begins roughly half an hour in. The resulting sleep inertia can last twenty minutes or more and is worse than not napping at all.
When is the best time to nap?: Early afternoon, which matches the natural dip in alertness and is far enough from bedtime not to interfere with sleeping at night.