Guide
Why Do I Feel More Tired After a Nap Than Before
Waking up groggy after a nap — sleep inertia — is caused by waking during deep sleep instead of light sleep. The timing and length of your nap determines whether you wake up refreshed or wrecked. But your personal sle...
Why it matters
Waking up groggy after a nap — sleep inertia — is caused by waking during deep sleep instead of light sleep. The timing and length of your nap determines whether you wake up refreshed or wrecked. But your personal sleep cycles and how quickly you enter deep sleep vary, which means the ideal nap length for you might be completely different from the standard advice. If naps consistently make you feel worse, the timing is almost certainly wrong for your specific sleep architecture.
When Normal helps
Normal tracks when you nap, how long you nap, and how you feel after. Over time it finds whether your naps are helping or hurting and what nap timing and length works best for your body's specific sleep patterns.
How Normal finds it
Tell Normal when you nap and how you feel when you wake up. Over a few weeks it compares your post-nap feelings to your nap timing and length and finds what works for your body. Most people find there's a very specific nap window that works for them and everything outside it makes things worse.
Editorial note
How to read this guide
Normal guides focus on pattern tracking: comparing symptoms, meals, sleep, stress, movement, routines, and timing over repeated days so people can notice what reliably changes how they feel.
Normal is not a medical provider. This guide is for general informational purposes and should not be used as medical advice, diagnosis, or treatment.
Related
Start with your body
Normal finds the pattern behind how you feel.
Tell Normal what happened in plain language. It connects your food, sleep, movement, stress, and symptoms over time.