About Deep Sleep

You’ve probably heard of deep, light, and REM sleep, but what makes one different from the others? Each has an important role to play in getting optimal sleep, and they happen at various times in the night in specific succession. In this article, we’ll focus on what deep sleep is, what happens during this phase of rest, and how it’s connected with the other sleep stages.

What is Deep Sleep?

When you sleep, your body goes through several sleep cycles divided into four main categories: light, deep, REM, and wake. The first time you go through deep sleep each night, you’ll be in this phase for about 45 to 90 minutes. As the night goes on, your time in deep sleep gets shorter.

What Happens During Deep Sleep?

Deep sleep is a highly restorative phase. It’s when your body heals and repairs itself, replenishing your cells and rejuvenating the immune system. As the constructive phase of sleep for the mind-body system, it is crucial for muscle growth and memory consolidation. It’s so closely tied to building strength that professional athletes have been known to take controlled substances to increase their time in this phase.

Deep Sleep as it Relates to Other Sleep Stages

Deep sleep accounts for 10-20 percent of your total sleep time, and most of your time spent in this stage typically occurs during the first third of your night. Deep sleep often takes place after light sleep has occurred, and is the precursor to the REM stage, the part of sleep that processes information and stores memories.

During deep sleep, you are the most disconnected from your environment, and it’s the most difficult stage to wake from. If you are disturbed while you’re in deep sleep, you will feel groggy and sluggish as you try to get out of bed. It’s best to wake up during light sleep when your body is already on the brink of being awake. Our Smart Alarm can help with that. Just set the time frame you’d like to wake up in and the Smart Alarm will wake you at the ideal moment in your sleep cycle. That way, you can rise feeling refreshed and ready for the day.

“The Power of Restorative Association”. American Psychological Association http://www.apa.org/monitor/2017/10/cover-sleep.aspx
Published on: June 10th, 2017 by: Leah Perri

Last modified on December 11th, 2018



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