Sleep is divided into several cycles, each consisting of different stages, including REM sleep and deep sleep. Both are essential for overall health and well-being, and getting a balanced cycle of REM and deep sleep is key to waking up feeling refreshed and ready to tackle the day.
REM sleep, or rapid eye movement sleep, is often associated with vivid dreams and cognitive functions such as learning, memory, and emotional regulation. Deep sleep, on the other hand, is all about physical restoration and repair. It is during this stage that the body repairs damaged tissue, strengthens the immune system, and improves bone structure and muscle.
So, what is the ideal amount of REM and deep sleep? According to sources, adults should aim for about 20-25% of their sleep to be REM sleep, which translates to roughly 1.5 to 2 hours per night for a recommended 7-9 hours of total sleep. For deep sleep, adults typically need about 13-23% of their sleep in this stage, which equates to about 1 to 2 hours per night in a 7-9 hour sleep period.
Characteristics | Values | |
---|---|---|
--- | --- | --- |
Number of sleep stages | 5 | |
Number of REM sleep stages | 1 | |
Number of NREM sleep stages | 3-4 | |
First stage of sleep | NREM 1 | |
Second stage of sleep | NREM 2 | |
Third stage of sleep | NREM 3 | |
Fourth stage of sleep | REM | |
Fifth stage of sleep | NREM 2 | |
REM sleep duration | 10-60 minutes | |
REM sleep percentage | 20-25% | |
Deep sleep duration | 45-90 minutes | |
Deep sleep percentage | 13-25% | |
Light sleep percentage | 50-60% |
What You'll Learn
Deep sleep is essential for health and wellbeing
Deep sleep, or slow-wave sleep, supports memory, growth, and cell regeneration. Not getting enough deep sleep may contribute to some health conditions, including heart disease and Alzheimer's disease. During deep sleep, the pituitary gland secretes important hormones, like the human growth hormone, which leads to growth and development. Other benefits of deep sleep include increasing blood supply to muscles, promoting growth and repair of tissues and bones, and strengthening the immune system.
Deep sleep is harder to wake from than other stages of sleep, and if you do wake up during this stage, you may feel groggy. This is because your body automatically tries to get as much deep sleep as possible early in the night. As the night progresses, your body alternates between light sleep and REM sleep.
Most adults need around 1.5 to 2 hours of deep sleep per night, which is about 13 to 25 percent of your total sleep. However, the amount of deep sleep you need depends on your age. If you're under 30, you may get two hours of deep sleep each night, while if you're over 65, you may only get half an hour or none at all.
If you're not getting enough deep sleep, you may wake up feeling exhausted. To improve your sleep quality, you can try taking a hot bath or spending time in a sauna before bed, as heat may promote more slow-wave sleep. You can also try to stick to a bedtime schedule, get regular exercise, avoid caffeine and alcohol before bed, and create a bedtime routine to help you unwind.
Deep sleep is crucial for your health and wellbeing, and making sure you get enough of it can help you feel rested and refreshed each day.
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Deep sleep is when the body repairs and regrows tissues
Deep sleep is the stage of sleep when the body repairs and regrows tissues. It is also when the body strengthens the immune system, builds bone and muscle, and releases essential hormones.
Deep sleep is the third stage of the four stages of sleep. The first stage is light sleep, followed by a slightly deeper light sleep, then deep sleep, and finally REM sleep. Each cycle takes around 90 to 120 minutes, and a person goes through these cycles four to five times every night.
During deep sleep, the body becomes less responsive to outside stimuli. Breathing slows down, muscles relax, and the heart rate becomes more regular. The thinking parts of the brain are mostly offline, and the body rebuilds and repairs itself. This is also when the body secretes growth hormones, which are associated with cellular rebuilding and repair.
Deep sleep is essential for health and well-being. Most adults need around 1.5 to 2 hours of deep sleep per night, which is about 13 to 25 percent of the total sleep cycle. However, the amount of deep sleep a person needs decreases with age. If you're under 30, you may get two hours of deep sleep each night, while if you're over 65, you may only get half an hour or none at all.
Deep sleep is crucial for memory, growth, and cell regeneration. Not getting enough deep sleep may contribute to health conditions such as heart disease and Alzheimer's disease. It is during deep sleep that the brain converts the information encountered during the day into memory. Additionally, the pituitary gland secretes important hormones during deep sleep, such as the human growth hormone, which leads to the growth and development of the body.
If you're not getting enough deep sleep, you may wake up feeling exhausted. To improve the quality of your sleep, you can try taking a hot bath or spending time in a sauna before bed, as heat may promote more slow-wave sleep. Creating a bedtime routine and avoiding bright lights and loud noises in the bedroom can also help you get a better night's rest.
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REM sleep is important for dreaming
Dreaming is believed to help process emotions, and REM sleep is important for dreaming. Dreaming is also thought to be a way for the brain to separate important memories from non-important ones. Dreams may also be a way for people to prepare for challenges and play through different scenarios in their heads.
REM sleep is the fourth of four stages of sleep. It is characterised by relaxed muscles, quick eye movement, irregular breathing, elevated heart rate, and increased brain activity. Most adults need about two hours of REM sleep each night.
REM sleep is also important for memory consolidation, emotional processing, and brain development. A majority of dreams occur during REM sleep, and these dreams are usually more vivid than non-REM sleep dreams.
During REM sleep, there is more activity in the visual, motor, emotional, and autobiographical memory regions of the brain. However, there is decreased activity in the region of the brain involved in rational thought, which is why dreams are often nonsensical.
REM sleep is believed to be essential for cognitive functions such as memory, learning, and creativity. While deep sleep tends to dominate the first half of sleep, REM sleep tends to take over the latter half, getting longer as one sleeps.
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The ideal amount of sleep varies by age
Sleep is divided into two categories: REM (rapid eye movement) and non-REM sleep. There are three stages of non-REM sleep, and one of REM sleep.
However, these recommendations are not universal, and individual sleep needs can vary. Some people may need more sleep, while others may need less. For example, some people may inherit the trait of being a "short sleeper" from their parents. Additionally, personal circumstances and health status can also affect sleep needs. People who are sick, recovering from an injury, or pregnant may need more sleep.
As people age, the amount and type of sleep they need also change. Newborns spend the most time in REM sleep, which is associated with brain development. As people get older, they tend to need less REM sleep. Similarly, older adults may need less deep sleep and spend more time in the second stage of non-REM sleep.
Deep sleep, which occurs in the third and fourth stages of non-REM sleep, is important for the growth and repair of tissues and bones, the strengthening of the immune system, and the release of hormones. While there is no specific requirement for deep sleep, younger people may need more as it promotes growth and development. Older people still need deep sleep, but getting less is not necessarily indicative of a sleep disorder.
REM sleep, on the other hand, is important for dreaming, memory, emotional processing, and brain development. Most adults need about two hours of REM sleep each night. However, this can vary depending on individual needs and circumstances.
Overall, getting enough sleep is crucial for maintaining physical and mental health. Sleep allows the body and mind to rest, recover, and prepare for the next day.
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Sleep disorders can impact the amount of REM sleep
Sleep is essential for health and well-being. Sleep occurs in cycles, with each cycle lasting around 90 to 110 minutes. A typical cycle consists of two types of sleep: rapid eye movement (REM) sleep and non-rapid eye movement (NREM) sleep. NREM sleep has three stages, and the cycle goes as follows: N1, N2, N3, N2, REM.
REM sleep is important for dreaming, and experts believe that dreaming helps process emotions. While there is no official agreement on how much REM sleep is needed, for most adults, REM sleep accounts for about 25% of total sleep, which is considered healthy.
Sleep disorders can impact the amount and quality of REM sleep a person gets. Conditions such as sleep apnea, restless leg syndrome, and REM sleep behavior disorder (RBD) can interrupt the sleep cycle and lead to restless sleep. RBD, for example, is a parasomnia where individuals physically act out their dreams during the REM stage, potentially causing injury to themselves or their bed partner. This disorder is often associated with neurodegenerative conditions, such as Parkinson's disease and Lewy body dementia.
Additionally, certain medications and substances can affect REM sleep. For instance, alcohol can reduce REM sleep early in the night, leading to a REM sleep rebound later as the alcohol wears off. Similarly, specific antidepressants have been linked to REM sleep disruptions, potentially causing RBD.
Age is another factor that influences REM sleep. Newborns tend to get the most REM sleep, and it decreases as people get older. This is because older adults typically need less REM sleep than younger adults, children, and babies.
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Frequently asked questions
Adults should aim for about 20-25% of their sleep to be REM sleep, which is roughly 1.5 to 2 hours per night if you're getting the recommended 7-9 hours of total sleep.
For deep sleep, adults typically need about 13-23% of their sleep in this stage, which equates to about 1 to 2 hours per night in a 7-9 hour sleep period.
If you're missing out on REM sleep, you may experience fatigue, disorientation, and emotional dysregulation. More long-term deprivation may result in more serious health concerns, including an increased risk of cardiovascular and non-cancer-related deaths when combined with other medical complications.
Deep sleep is associated with essential benefits to our physical wellbeing, including promoting physical healing and repair, boosting immune system functionality, facilitating growth and development, enhancing memory consolidation, and supporting brain health.
Signs that you may not be getting enough REM or deep sleep include daytime fatigue, mood swings, difficulty concentrating, memory issues, and a general feeling of not being well-rested.