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Dr. Gina Poe: Use Sleep to Enhance Learning, Memory & Emotional State

Huberman Lab

NOTE

Set That 90 Minute Alarm Clock

It is important to complete a 90-minute sleep cycle prior to waking up to avoid grogginess. One should listen to their body and wake up naturally if possible. Sleep inertia, which causes grogginess, occurs when waking up in the wrong sleep stage. The 90-minute cycle is like a washing machine cycle, where the first part adds water and the clothes are soaking wet. Waiting for the full cycle to complete allows the body to function well. The first sleep cycle is longer, around 105-110 minutes, while the subsequent cycles get shorter. Setting a 90-minute alarm clock is recommended for optimal sleep.

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