The Stages of Sleep and What They Mean, According to Experts
quality is valued over quantity. In other words, you may get a full night’s rest on a regular basis, but if you toss and turn or take frequent bathroom breaks, you may not complete enough sleep cycles to feel refreshed come morning. Five or six cycles are recommended for adults, says
, associate managing editor at MCG Health, which translates to seven and a half to nine hours of uninterrupted shut-eye per night.One sleep cycle marks the completion of all four stages of sleep, and it lasts around 90 minutes, according to Moore. But research shows thatThe stages of sleep are divided into two types: non-rapid eye movement , which characterizes stages one through three, and rapid eye movement sleep, which characterizes stage four.
, and it initiates a slowdown of the body’s main processes: The mind calms; heartbeat, breathing, and eye movements slow; and muscles relax.
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