Herbie Murray
Sleep cycles are essential to our physical and mental health, but the exact reason why we need sleep is still unknown. Sleep cycles are made up of four stages, which fall into two phases: non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep makes up 75-80% of the sleep cycle. The average sleep cycle lasts 80-100 minutes, and a full night of rest allows for four to six sleep cycles. Sleep cycles can be tracked using apps and smart beds, but these require an internet connection.
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What You'll Learn
Sleep cycle apps
Sleep Cycle relies on your smartphone's accelerometer to monitor movement. The idea is that you place your smartphone near you in bed and that it will register movements. When you are in deeper sleep, especially REM sleep, it will document this stillness. When you are restless towards morning, drifting into lighter stages of sleep, it will seize on this wakefulness to alert you to get up for the day.
The Sleep Cycle app also has a training program for anyone who wants to learn more about sleep. You can opt in to receive a set of guides to help you with sleep. The app also has a Weekly Report feature, which allows you to quickly see a pattern and identify days where sleep was not optimal so you can see what was different about that day.
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Sleep stages
Sleep is essential to good physical and mental health. While experts still don’t know exactly why humans need sleep, they do agree on its specific benefits, including energy conservation. The sleep cycle is regulated by the circadian rhythm, which is driven by the SCN. The circadian rhythm also controls the nocturnal release of adrenocorticotropic hormone (ACTH), prolactin, melatonin, and norepinephrine (NE).
A sleep cycle is the period when your brain and body rotate through the four sleep stages. Typically, a full night of rest allows for four to six sleep cycles. To achieve highly restorative sleep, you need to progress easily through the four stages of sleep, as each plays an important role in maintaining your physical and cognitive health. The average sleep cycle lasts 80 to 100 minutes, at which point it starts over. The four stages of sleep fall into one of two phases: non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep accounts for 75 to 80% of the sleep cycle.
The first stage of sleep is the transition between wakefulness and sleep. Your sleep at this stage is light and easily interrupted. The second stage is the first stage of true sleep. Your heart rate and breathing slow, and you start to become unaware of your surroundings. The third stage is slow-wave sleep or deep sleep. In this phase of sleep, your breathing and heart rate have slowed. The fourth stage is REM sleep.
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Sleep cycle duration
Sleep is essential for good physical and mental health. The sleep cycle is made up of four stages, which fall into two phases: non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep accounts for 75-80% of the sleep cycle. Typically, a full night of rest allows for four to six sleep cycles, each lasting 80 to 100 minutes. The sleep cycle is regulated by the circadian rhythm, which is driven by the SCN. The circadian rhythm also controls the nocturnal release of certain hormones, including adrenocorticotropic hormone (ACTH), prolactin, melatonin, and norepinephrine (NE).
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Sleep cycle benefits
Sleep cycles are the period when your brain and body rotate through the four sleep stages. Typically, a full night of rest allows for four to six sleep cycles, each lasting 80 to 100 minutes. The four stages of sleep fall into one of two phases: non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep accounts for 75 to 80% of the sleep cycle.
The sleep cycle is vital to achieving high-quality rest. Each sleep stage plays a part in allowing the mind and body to wake up refreshed. A good night's sleep depends on the sleep cycle, which is made up of four sleep stages. Understanding the sleep cycle stages may be one way to help you catch more sleep.
The benefits of a good sleep cycle include:
- Energy conservation: Sleep is when the body conserves and restores energy.
- Tissue repair: In your deepest sleep, your body repairs and regrows tissues, builds bone and muscle, and strengthens the immune system.
- Brain recuperation: Sleep allows the brain to recuperate from the day and support multiple functions.
- Natural balance: Sleep restores the natural balance among neuronal centres, which is necessary for overall health.
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Sleep cycle regulation
A typical sleep cycle consists of four stages, which fall into two phases: non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep makes up 75 to 80% of the sleep cycle. On average, a sleep cycle lasts between 80 and 100 minutes, and a full night of rest allows for four to six sleep cycles.
To achieve highly restorative sleep, it is important to progress easily through the four stages of sleep, as each stage plays a role in maintaining physical and cognitive health. While the exact reasons why humans need sleep are still unknown, it is clear that sleep is essential for overall health and well-being.
Some smart beds, such as the Sleep Number smart bed, can be connected to the internet and used to track sleep cycles. However, an internet connection is not required for the bed to function, and sleep cycle tracking can be paused at any time using the Privacy Mode feature.
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Frequently asked questions
No, the Sleep Cycle app does not need an internet connection to work.
The Sleep Cycle app tracks your sleep and wakes you up at the optimal time, when you're the furthest out of your REM cycle.
The Sleep Cycle app uses machine learning to track your sleep and wake you up when your sleep is the lightest.
Yes, you can use the Sleep Cycle app with just your iPhone.
