How long is the best lunch break?

What is the best time to take a nap, when and how long? The most suitable time for a healthy nap is 15 ~ 30 minutes. If it exceeds 30 minutes, the body will enter a deep sleep period that is difficult to wake up. It is best to extend it to 1 ~ 1.5 hours to complete a complete sleep cycle. If you take a long nap, you will have a slight headache and general weakness in the first half hour, which is caused by "sleep inertia". At this time, I will wake up immediately and return to normal after an hour of buffering. However, this long nap is only suitable to supplement the lack of sleep the night before, and a really healthy nap should not last more than 30 minutes, otherwise it will easily disturb the physiological clock and affect the normal night sleep. If you want to take a nap, you should form the habit of timing and quantifying every day. The best time to take a nap is 8 hours after waking up in the morning and 8 hours before going to bed at night, which is the middle of the day's activities. Even if you don't feel sleepy then, you can have a rest instead of drinking coffee as a refreshing soup. Caffeine may provide a short-term refreshing effect, followed by a feeling of drowsiness, which will also shorten the sleep cycle at night. Don't use artificial stimulants to trick the body, but take a nap to solve the problem. The habit of taking a nap should be persistent, because irregular nap habits will also disrupt the physiological clock and affect the law of staying up late. For example, staying up late is not only bad for your health, but also delays your sleep time at night. People with insomnia should avoid taking a nap during the day. Parents of newborns should rest together when their children take a nap, instead of working all the time and ignoring sleep. If there is an important dinner or activity in the evening, it may delay the time to sleep at night, so you can reserve sleep in advance in the afternoon. This kind of preventive sleep can last two or three hours, which is really helpful. "Rest is to go further" can best illustrate the magical power of nap.