In this stage, your emotions and emotional memories are processed and stored. This is the stage when you see dreams, your breathing gets faster and irregular, and your body temporarily gets paralyzed, which also prevents your body to act on your dreams. During this stage, your brain acts closely as it does in the active hours. Rapid Eye Movement is the final stage of sleep in which your voluntary muscles become immobilized. In this stage, your body starts its physical repairs, and your brain consolidates some crucial memories like personal experiences, general knowledge, and other experiences. A person should take enough of the NREM Stage 3 sleep for a relaxed and refreshed body the next day. It is when any background noises or activity in the environment may not wake up the sleeping person. This is when your brain, muscles, and heartbeat slows down to the lowest. Your brain starts gathering, processing, and filtering the previous day’s memories. Also, your breathing and heart become more regular. Your body temperature drops, and your eye movement stops gradually. In this stage, you become less aware of your surroundings, and normal sounds may not affect your sleep. It lasts for up to 20 minutes per sleep cycle in NREM Stage 2. NREM Stage 2Īccording to American Sleep Foundation, people spend about 50% of their sleep in this stage. But, if someone disturbs you a bit or any loud sound happens around you, you may wake up easily. Your breathing, heartbeat, and eye movement slow down, entering light and relaxed environment. In this stage, your muscles and brain slow down and relax. This is the first stage of the sleep cycle in which your body enters the sleep, and you are in between the wakefulness and sleep condition. And since deep sleep is part of NREM sleep, we will also talk about that. There are different stages of sleep cycles that include rapid eye movement (REM) sleep and non-rapid eye movement (NREM) sleep.
#Light vs deep sleep full#
In some smartwatches, you can also look for how much time you are awake in between your full sleep. You can check your light sleep, deep sleep, and different sleep cycles on your smartwatch, depending on the features. This is how a smartwatch detects and tracks deep sleep. And as we know that during deep sleep, our heartbeat slows down to the lowest, allowing it to track and detect our deep sleep. It helps the smartwatch to check which sleep cycle you are in. The gyroscope and accelerometer sensors help track your wrist movements through which it detects whether you are sleeping or awake.Īfter that, smartwatches also use the heart rate monitor to detect your heartbeat during sleep. The smartwatches track your sleep with the help of a gyroscope, accelerometer, and heart rate monitor. Increases Blood Supplies to Muscles How a Smartwatch Detects Deep Sleep?.It lasts for a longer period in the first half of the night and gets shorter as the time goes on. The first deep sleep stage can last anywhere between 45-90 minutes.
Deep sleep is also known as slow-wave sleep (SWS) or delta sleep. During deep sleep, it is very hard to get awake, even with loud noises around you.
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