brain waves that are active to levels that are similar to when you are awake.You will experience REM sleep for the first time in the night, around 90 minutes after you fall asleep. This is the REM sleep stage, and it is very different from the other three stages of sleep. Heartbeat, breathing rate, and brain waves slowing down to their lowest levels.It is the deep sleep stage where your body heal. Heartbeat and breathing rate slowing down even further.It is the sleep stage before the deep sleep stage. Heartbeat and breathing are slowing down. This stage lasts for a few minutes and is a light stage of sleep from which it is easy to awaken. It takes you from being awake to being asleep. There are four main sleep cycles, and you go through each of them multiple times each night. It can be easy to think that we just shut down for the night when we go to sleep.īut sleep is actually a very active process with your brain and body going through changes throughout the night.
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