roundings . While breathing and heart rate remain about the same as when awake , the body temperature drops 1-2 °. This stage represents nearly 50 % of the total sleep cycle .
Stage N3 ( Non-REM 3 ): “ deep sleep .” This is “ the good stuff ” where the restorative process begins . Hormonal regulation , cellular repair , and rejuvenation take place . During N3 , individuals resist waking . If they do , they may be disoriented or groggy . N3 can last from 45-90 minutes . This stage of the cycle lasts longer during the first several cycles of sleep every night .
Rapid Eye Movement Sleep ( REM ): the final stage . We associate REM with dreaming . With the exception of the eye muscles , all voluntary muscles
Have your ever considered how a lack of sleep might accelerate the way your skin ages ?
become motionless and tranquil . There are involuntary movements of the eyes , which remain closed . Brain activity , heart rate , and blood pressure increase . Unlike N3 , REM time increases with each sleep cycle . The first period typically lasts 10 minutes then gets longer . Younger people spend 50 % of their time in the REM stage – adults spend only 20-25 %.
Sleep , Hormones , and Skin
Understanding sleep helps drive awareness of its vital importance to our skin . Stress and worry can push us farther
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