Monday, November 2, 2015

What is sleep inertia?

Sleep inertia is the groggy feeling which lasts about 30 minutes after waking up from a 30-60 minute nap. Waking up during REM sleep (deep sleep) results in this grogginess.

Sleep inertia is avoided  by taking a longer (90 min.) nap because an entire sleep cycle (including the REM sleep) is thus concluded.

Sleep inertia can also be avoided by taking shorter (10-20 min.)  naps, meaning waking up before hitting the REM phase of a sleep cycle.

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