How to Wake Up Feeling Refreshed: Beating Sleep Inertia
Sleep inertia is the groggy, slow feeling after waking. It usually fades within 15 to 30 minutes, but some habits shorten it.
What causes it?
The brain does not switch on instantly. Areas that control alertness take time to reach full activity, and the effect is stronger after deep sleep or sleep loss.
Seven habits that help
- Get enough total sleep.
- Keep a consistent wake time.
- Let in daylight straight away.
- Drink water.
- Move for a few minutes.
- Delay the snooze button.
- Have caffeine after waking if you use it, not in the middle of the night.
Timing your alarm
A bedtime that lands your alarm near the end of a cycle may reduce grogginess. See our article on waking mid-cycle for what the evidence says.
Avoid the snooze trap
Snoozing adds short, light sleep that can deepen grogginess. Set the alarm for the time you actually need.
When it may be a problem
Extreme, long-lasting grogginess, or waking unrefreshed every day, can indicate sleep apnoea or another disorder. See a doctor.
Frequently asked questions
How long should grogginess last?
Usually 15 to 30 minutes.
Should I avoid deep sleep?
No, it is essential.
Does a cold shower help?
It may wake you, but the evidence is limited.
Summary
- Sleep inertia is normal and short-lived.
- Light, water and movement help.
- Skip the snooze.
- See a doctor if it persists.
Medical disclaimer: This article is for general information only and is not medical advice. If you have persistent sleep problems or excessive daytime sleepiness, speak with a doctor or sleep specialist.