What is REM Sleep?

Not all the stages of sleep are created equal: They all have different functions that come together to give you a restorative night. While they're all important, REM sleep has the benefits you really don't want to miss out on—but very well might be. We dug into this sleep cycle to find out what it is, why it's so important, and how to spend more time in it every night. 

What happens during REM sleep?

REM sleep, or rapid eye movement sleep, is most well known for being the stage of sleep where we dream. The first REM cycle of the night typically lasts 10 minutes, and it happens 90 minutes after you fall asleep. Each REM stage will get longer as the night goes on.

Here are some of the most notable things that can happen to your body during REM sleep:

  • Rapid eye movement (that’s where the name comes from)
  • Increased heart rate and blood pressure
  • Brain activity high
  • Temporary paralysis of muscles
  • Increased breathing rate
  • Changes in body temperature

This all sounds like someone who is awake, doesn’t it? Well, under a brain monitor, REM sleep can mimic the brain activity of an awake person.

What is the purpose of REM?

Memory consolidation

This is the most widely accepted theory regarding the purpose of REM sleep, with significant research to back it up. Many studies suggest that when REM sleep is restricted, new memories aren't formed as easily. That's because REM sleep offers the right environment for the brain to change. Think of it as "pruning" the brain's synapses, which allows for learning and memory consolidation.

Stimulating the central nervous system

Given newborns are in a REM sleep-like state for much of their early lives, another theory is that REM sleep is necessary for brain development.

How much REM do we need?

So, how much REM sleep do we really need? We know that the average sleeper experiences three to five REM cycles nightly.

That number will of course vary depending on how much time you spend sleeping, where seven to eight hours of nighttime sleep is optimal. Healthy sleepers might spend approximately 20% of their sleep time in the REM sleep stage. Generally, if one gets about 90 minutes of REM sleep total on a nightly basis, they're in good shape.

Some research suggests insufficient REM sleep can cause migraines and decreased mental focus, along with the aforementioned issues surrounding memory and learning.

How can I get more REM sleep every night?

If you have a feeling you're not getting enough REM sleep, there are a handful of things you can do to help the body and brain enter this important stage:

Try a sleep supplement

Taking a relaxing supplement like SLUMBER before bedtime may help promote deeper, more REM-filled sleep, as it's been shown to help people fall asleep faster and stay asleep longer. Research has found that magnesium can benefit those with insomnia by promoting longer sleep and has also been studied for its positive effects on stress that can inhibit sleep.

completeblue's SLUMBER combines magnesium with jujube, a fruit used in traditional Chinese medicine for calming and sedation for a nightly supplement that promotes an

Follow a consistent sleep/wake schedule

Our bodies all have an internal clock, aka circadian rhythm, and living in sync with it helps us out tremendously. So, waking up and going to bed at the same time every day will help you both fall asleep and have a restful (and REM-filled) night's sleep.

Curate your bedtime routine

Along with setting your sleep and waking times, have a relaxing bedtime routine. This makes it easier for both the mind and the body to prepare for the sleep experience, progressing through the regular sleep stages, ultimately reaching the REM stage.

Avoid alcohol before bed

Avoiding smoking and alcohol consumption immediately before bedtime is highly recommended. Multiple studies have found that drinking alcohol before bed inhibits REM sleep — as do some pharmaceuticals and marijuana.

The bottom line

Sleep is essential for our health and overall sense of well-being, and REM sleep is a stage you definitely want to get enough of. Taking a relaxing supplement, keeping up with a consistent bedtime and nightly routine, and avoiding alcohol can all pay dividends for your REM sleep.


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