Sleep Cycles Explained Simply

June 13, 2020

Sleep Cycles Explained Simply

Sleep Cycles Explained Simpy 

Sleep cycles are the progression through the various stages of NREM (non-rapid eye movement) to REM (rapid eye movement) sleep, we go through each night while sleeping before beginning the cycle again. An entire sleep cycle lasts between 90 -120 minutes. The average person goes through all 4 sleep cycles 3-5 times per night. Once you go through all four stages once, you repeat the process, again, so on and so forth until you wake up. Here are all 4 sleep cycles explained simply. 

Sleep Cycles Explained Simpy

  • There are 4 stages of sleep. The first 3 stages of sleep makeup NREM (non-rapid eye movement) and the last stage of sleep is REM (rapid-eye movement).
  • An entire sleep cycle lasts for approximately 90-120 minutes and the average person goes through all 4 stages 3-5 times per night.

Stage 1

Stage 1 is the beginning of the sleep cycle and is the shallowest stage of sleep. During this stage, the brain produces alpha and theta waves which is often associated with relaxation. Sudden muscle jerks can occur in this sleep cycle. Stage 1 is very short, typically lasting between five to ten minutes. 

Stage 2

Stage 2 is the first actual stage of defined NREM sleep. During this stage, your heart rate begins to drop and so does your body temperature. There is also an increase in theta wave frequency and k complexes. Theta wave activity is classified as slow brain-wave activity and is often associated with creativity, daydreams, and is a repository for memories and emotions. According to the American Sleep Foundation, people spend approximately 50% of their sleep in this stage. 

Stage 3

Stage 3 is the most restorative stage of sleep and is the beginning of deep sleep. There are no muscle or eye movements in this stage. During stage 3 your body temperature drops, blood pressure falls, breathing slows, and your body begins to repair muscle and tissues. This sleep cycle can typically last between 45 to 90 minutes and is difficult to wake someone up while they are in this stage of sleep.

REM

REM is the longest stage of sleep and is also the stage where most of our dreaming occurs. During REM sleep your heart rate and blood pressure increase and your breathing is faster. Brain waves are also more active during this stage and as Jeffrey Lliff, Ph.D., assistant professor at Oregon Health and Science University said, "on brain scans, REM sleep looks a lot like being awake." The American Sleep Foundation estimates that people spend approximately 20% of their total sleep time in this stage. 

Sleep Cycles Explained Simply Recap 

A sleep cycle is a progression through the various stages of NREM (non-rapid eye movement) sleep to REM (rapid eye movement) sleep, before beginning the cycle again. An entire sleep cycle lasts approximately 90 - 120 minutes. The average person goes through all 4 stages 3-5 times per night. Once you go through all four stages once, you repeat the process again, so on and so forth until you wake up. It is important to go through each sleep cycle multiple times in order to give your body and brain an ample amount of recovery time. 

Overall 

  • There are 4 stages of sleep.
  • The first 3 stages makeup NREM (non-rapid eye movement) and the last sleep cycle is REM (rapid-eye movement) sleep.
  • An entire sleep cycle lasts for 90 - 120 minutes.
  • The average person goes through all 4 stages 3-5 times per night.



Also in Health

Everything You Need To Know About Stem Cell Supplements
Everything You Need To Know About Stem Cell Supplements

December 16, 2020

According to the most recent scientific estimates there are roughly 30 trillion cells in the human body, all of which arise from one unified cell through various cycles of division. If you were to write that number out that's 30,000,000,000,000! The process of cellular renewal continues throughout life as old and weak cells are replaced by new ones, however, after the age of 25 your body's cells begin to decline.

Read More

Stem Cell Activation by Stemulife™
Stem Cell Activation by Stemulife™

October 06, 2020

Stem cell therapies and regenerative medicine are new and upcoming medical treatments. Stem cells are undifferentiated cells that reside throughout the body that give rise to other kinds of cell types (neurons, heart cells, bone cells, etc.) Recently these cells have been studied for anti-aging effects, reversing blindness, regenerating cartilage, etc.

Read More

Recommended Amount of Sleep Per Age Group
Recommended Amount of Sleep Per Age Group

June 19, 2020

The recommended amount of sleep an individual should get each night depends on a variety of factors. This includes age, gender, activity levels, and genetics. In this article, we are going to cover the recommended amount of sleep each age group should get courtesy of the National Sleep Foundation (NSF), who states, “The recommendations are the result of multiple rounds of consensus voting after a comprehensive review of published scientific studies on sleep and health.”

Read More

Welcome To Our Family

Fitore Nutrition

Stay a part of the Fitore family and receive special discounts!