Normal men usually go into deep sleep in about an hour. Deep sleep promotes metabolism and is good for the body. It is the same for both men and women. Deep sleep is a part of fast-wave sleep, accounting for 25% of the entire sleep time. Deep sleep can improve the body’s immunity, making the body more capable of preventing and resisting diseases, etc., and relieving exertion. However, as each person’s physical condition is different, the sleep situation is also different. If often light sleep, or even insomnia, can seriously affect the brain function, suffering from neurasthenia and other diseases, affecting life and work. You should try to be punctual, keep the rhythm of the biological clock, and maintain the habit of regular meals and sleep. In addition, you should also exercise reasonably, through the relief of tension, so that the body and mind to relax and promote sleep. It is necessary to maintain a good routine in order to enter deep sleep more quickly.