The heart only rests best from 10:00 pm to 5:00 am. With sufficient rest time for the blood to fully flow back to the heart, the heart will not stop for a minute, and if the heart stops for longer than 2 seconds it means that there is an abnormality in the body. When a person is in a sleep state heart rate will slow down, the heart does less work, but also considered some kind of rest, to 10 pm is the best time for the heart to rest, sleep on time will allow the heart and body to relax and adjust, 11-2 pm body organs are in a state of detoxification, grasp the sleep time is vital, not on time to rest at night to stay up late will let the body organs are affected, on their own health cause a burden. Adults rest time in 9 hours, will be conducive to health, children rest 10-12 hours, the heart rest to regular, do not reverse the day and night.