Desert The average sleep heart rate of ordinary healthy adults is normal in the interval of 50~70 beats/min. If you usually run marathons and ride long distances all the year round, there is no need to panic if this value drops to 40 beats/min.
When a person falls asleep, the sympathetic nerve stops, and the vagus nerve dominates, which is equivalent to switching the heart to a low-power energy-saving mode. The heart rate will naturally be 10-30 beats/min lower than when he is awake and resting, which is a normal physiological reaction. I had a friend who had been running for three and a half years before. Last time, he came to me with his smart watch sleep report, saying that the lowest heart rate was 38 when he was sleeping deeply. He was afraid that he was bradycardia, so he went to do 24-hour dynamic ECG. The doctor saw that his resting heart rate was only 52 at ordinary times, saying that this was a good performance of cardiopulmonary function, and it was completely fine.
However, it must be said here that there is no completely unified standard for the lower limit of sleep heart rate of non-exercise people: many clinical cardiologists think that as long as there is no dizziness, chest tightness and general fatigue after waking up, even if the average sleep heart rate reaches 45 beats/minute, no special intervention is needed; There is also a conservative view that if the average heart rate of people who don't usually exercise for a long time is lower than 50, it is best to do a dynamic ECG check to see if there is any atrioventricular block.
I have compiled the reference intervals of the average sleep heart rate of different groups of people. You can look at it according to your own situation:
| Population classification | Normal interval of average sleep heart rate | remarks |
|---|---|---|
| Ordinary healthy adults aged 18~65 | 50~70 times/minute | Occasionally, the deep sleep stage is less than 50 times/minute, and it is normal without discomfort. |
| Long-term endurance sports enthusiasts | 40~65 times/minute | No chest tightness, dizziness and other symptoms, no need for additional examination. |
| Teenagers aged 6-17 | 55~85 times/minute | The basal metabolic rate is higher than that of adults, and the heart rate is generally high |
| Older people over 65 years old | 50~65 times/minute | If it is higher than 70 beats/min for a long time, it is recommended to investigate sleep apnea or cardiovascular basic problems. |
In addition to the value itself, what is more worthy of attention is actually your own heart rate baseline change. For example, your average sleep heart rate has always been around 60, and suddenly it has risen above 70 for a week or two. If you rule out the clear incentives of staying up late the day before, drinking milk tea and coffee, catching a cold and having a fever, you should be careful. A while ago, I had a colleague at the next table. He didn't exercise much at ordinary times. His average heart rate was above 75 for three weeks in a row. After waking up, he always felt tired. When he went to the hospital, he found that it was moderate sleep apnea. When he fell asleep at night, he was always deprived of oxygen. His heart could only jump for oxygen. After being adjusted for half a month with a ventilator, his heart rate returned to the normal range of about 60.
Now everyone wears smart watches, so don't be too kidnapped by numerical values. After all, the sleep heart rate will fluctuate back and forth with your state and sleep stage of the day. As long as the overall average is in the normal range of the corresponding crowd and you are refreshed after waking up, there is no need to worry about the high or low value that you jumped out of.
