During sleep, the body goes through multiple sleep cycles. Each cycle consists of four stages: three stages of non-rapid eye movement (non-REM) sleep and one stage of rapid eye movement (REM) sleep. A ...
The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced. By Clarissa Brincat Published Sep 9, 2025 9:00 AM EDT Image: DepositPhotos Get the ...
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