Ashwin Lewis
When a person is sleeping, their pulse slows down, but it can also be affected by other factors such as age, weight, genetics, physical activity, and health conditions. The pulse varies depending on the phase of sleep, with the lowest rates occurring during deep sleep, and higher rates during REM sleep, when the pulse can rise in response to dreams involving activity or emotion. Generally, a sleeping heart rate of 40 to 100 beats per minute is considered normal for adults, but if it falls below 40 or rises above 100, it may be a cause for concern.
| Characteristics | Values |
|---|---|
| Pulse during sleep | It varies depending on the sleep stage and individual factors. |
| Average adult pulse during sleep | 40–75 beats per minute (bpm) |
| Average adult resting pulse | 60–100 bpm |
| Children's pulse during sleep | Higher than adults, depending on age |
| Pulse during light sleep | Begins to slow |
| Pulse during deep sleep | Reaches its lowest levels |
| Pulse during REM sleep | May speed up to a similar rate as when awake |
| Pulse during non-REM sleep | Tends to cycle down |
| Pulse during dreams | May increase |
| Pulse and cardiovascular health | A consistently high pulse during sleep may indicate cardiovascular issues |
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What You'll Learn
The pulse varies depending on the sleep stage
During non-REM sleep, the heart rate and blood pressure tend to decrease, especially during deep sleep. Dr Faulx explains that this is a period when the heart is allowed to rest and does not need to beat fast. On average, a healthy adult's resting heart rate is about 60 to 100 beats per minute during the day, while their normal heart rate during sleep is between 50 and 75 beats per minute.
Waking up during any stage of sleep increases sympathetic activity, elevates heart rate and blood pressure, and lowers HRV. If the heart rate does not slow down during sleep, it could indicate cardiovascular health issues. However, this only applies if it happens frequently.
The heart rate during sleep is influenced by several factors, including age, weight, genetics, physical activity, and other health conditions. For instance, physically active adults and athletes tend to have slower resting heart rates. Additionally, certain lifestyle choices, emotional stress, and underlying medical conditions can cause an elevated heart rate during sleep.
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During REM sleep, the pulse can rise
During sleep, the human heart rate usually slows down, but it can also be subject to fluctuations depending on the phase of sleep. The different stages of sleep include light sleep, deep sleep, and rapid eye movement (REM) sleep. While the heart rate reaches its lowest levels during deep sleep, it may speed up during REM sleep to a rate similar to that of a person when they are awake.
REM sleep is characterised by periods of higher activity, and the heart rate during this stage can vary significantly. Dr Epstein of Harvard-affiliated Brigham and Women's Hospital explains that "your heart rate can vary quite a bit during REM sleep because it reflects the activity level occurring in your dream. If your dream is scary or involves activity such as running, then your heart rate rises as if you were awake."
While a slight increase in heart rate during sleep is not usually a problem, a consistently high rate could indicate an underlying issue. Dr Faulx clarifies that "if you’re having a sleeping heart rate of below 40 beats per minute or above 100 beats per minute during sleep as an adult, that would be outside of the normal range." An elevated heart rate during sleep could be caused by lifestyle choices, emotional stress, or underlying medical conditions. Heart disease, arrhythmia, high blood pressure, thyroid issues, anaemia, and sleep disorders are some conditions that can cause an increased heart rate.
Monitoring one's heart rate is important, and wearable devices like fitness trackers and smartwatches can help monitor heart rate continuously, even during sleep. These devices can provide valuable insights into one's average heart rate and help identify any unusual spikes. Additionally, maintaining positive habits such as regular exercise can help strengthen the heart and improve overall health.
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The pulse slows during non-REM sleep
During sleep, the human heart rate typically slows down to a range of 40 to 75 beats per minute (bpm). This decrease is due to the body's reduced need for oxygen, which in turn slows the heart's pumping of blood. However, the heart rate during sleep can vary depending on the stage of sleep, with the deepest sleep stages being associated with the slowest heart rates.
Non-rapid eye movement (NREM) sleep, which includes light sleep, deeper sleep, and deep non-REM sleep, is characterised by a slower heart rate compared to REM sleep. During non-REM sleep, the body's nervous system stimulation is reduced, and most bodily processes slow down, including the heart rate. This slow-wave sleep is considered a period of rest for the heart, allowing it to "hibernate" during the night.
The average adult's resting heart rate during the day is typically between 60 and 100 bpm. However, during non-REM sleep, the heart rate can drop to as low as 40 bpm, especially in well-trained athletes. This slower heart rate during non-REM sleep is considered beneficial for cardiovascular health and protection against cardiovascular events.
While a slight increase in heart rate during sleep is not usually a concern, consistently high rates may indicate an underlying health issue. Conditions such as hyperthyroidism, anaemia, sleep disorders, or emotional stress can contribute to an elevated heart rate during sleep. Therefore, monitoring one's heart rate during sleep can provide valuable insights into overall health and help identify any unusual changes.
In summary, the pulse slows during non-REM sleep as the body transitions into a state of rest. This decrease in heart rate is considered normal and healthy, and it plays a crucial role in maintaining cardiovascular health. However, significant deviations from the typical heart rate range during sleep can warrant further investigation and consultation with a healthcare professional.
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A slow pulse during sleep may be healthy or unhealthy
A person's heart rate is slower during sleep than when they are awake. However, it is essential to understand that a slow pulse during sleep may be healthy or unhealthy, depending on several factors.
During sleep, a person's heart rate normally falls below the typical resting heart rate range of 60 to 100 beats per minute (bpm) for adults. A sleeping heart rate of 40 to 50 bpm is considered average for adults, although this can vary. Factors such as age, weight, genetics, physical activity, and health conditions influence an individual's normal heart rate. For example, physically active adults and athletes often have a resting heart rate slower than 60 BPM due to strengthened heart muscles.
During the stages of sleep, the heart rate fluctuates. In the initial light sleep stage, the heart rate begins to slow down. It reaches its lowest levels during deep sleep, also known as non-rapid eye movement (non-REM) sleep. Non-REM sleep is considered a period of rest for the heart, with a relaxed heart rate that can help protect against cardiovascular events.
In contrast, during rapid eye movement (REM) sleep, the heart rate may speed up to a level similar to when a person is awake. This increase in heart rate during REM sleep reflects the activity in a person's dream. If a person is experiencing activity or intense emotions in their dream, their heart rate rises accordingly.
While a lower heart rate during sleep is generally considered normal and indicative of a healthy heart, there are cases where a slow pulse can be a cause for concern. Bradycardia, a condition characterised by a heart rate that is too slow, can occur due to underlying health issues such as heart disease, rheumatic fever, Lyme disease, sleep apnea, or certain medications. Additionally, a sleeping heart rate below 40 BPM or above 100 BPM for adults is considered outside the normal range and may warrant further investigation, especially if accompanied by other medical conditions or symptoms.
In conclusion, a slow pulse during sleep can be healthy when it falls within the average range for an individual's age and fitness level, indicating a well-functioning heart. However, it can also be unhealthy if it falls below 40 BPM or is accompanied by symptoms associated with bradycardia or other health conditions. Therefore, it is essential to consider multiple factors and consult with a medical professional when assessing the health implications of a slow pulse during sleep.
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A high pulse during sleep could indicate a problem
A person's heart rate usually decreases when they are asleep. However, a high pulse rate during sleep could indicate an underlying problem.
During the first stages of light sleep, the heart rate begins to slow down. In deep sleep, the heart rate reaches its lowest levels. However, in rapid eye movement (REM) sleep, the heart rate may speed up to a level similar to that of a person when they are awake. This is considered normal.
However, if your heart rate during REM sleep exceeds your normal waking heart rate, it could indicate a problem. According to Dr. Faulx, a sleeping heart rate of above 100 beats per minute in adults is outside the normal range and could be cause for concern. Similarly, Dr. Epstein states that during sleep, the stimulation of the nervous system is reduced, and most body processes slow down.
A high pulse during sleep could indicate a sleep disorder, such as sleep apnea, which is characterized by a constant, intermittent inability to breathe. It could also be a sign of other medical or psychological conditions, including anxiety or atrial fibrillation.
If you are experiencing a high pulse rate during sleep, it is recommended that you consult a sleep doctor or healthcare professional for further advice and guidance. They can help determine if there are any underlying issues that need to be addressed.
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Frequently asked questions
On average, a person's heart rate slows down during sleep. However, it can fluctuate depending on the stage of sleep.
A sleeping heart rate of 40 to 75 beats per minute is considered normal for adults.
A high heart rate during sleep can be caused by lifestyle choices, emotional stress, or underlying medical conditions such as heart disease, arrhythmia, high blood pressure, thyroid issues, anaemia, or sleep disorders.
Sleep bradycardia is a slow heart rate during sleep. It may be a natural, healthy sleep response or a sign of an underlying health issue.
