Myth #1: Extended sleep is beneficial. Sleep is not better than more sleep, but it needs to be truly quality sleep. Judge the quality of sleep, generally to the next day whether to feel refreshed, energetic as an indicator, simply extend the sleep time is not beneficial to the body. Myth 2: Sitting down to sleep is not harmful to health. Sitting down to sleep not only muscle can not get a good relaxation, is not conducive to eliminating fatigue, and will make the heart rate slow down, blood vessel expansion, the organs, especially the brain blood flow is reduced, coupled with the stomach digestion needs blood supply, the brain is more lack of oxygen, it is easy to produce dizziness, tinnitus and other symptoms. Have a nap and like to snooze people, it is best to find a place to lie down flat, try not to lie down to sleep. Especially the elderly and the heart function is not good, more can not sit to sleep.? Myth 3: hanging a clock on the bedroom wall is normal. Clocks tend to give people mental stress, especially for those who have trouble sleeping. The bedroom should be an environment where time does not count. If you’re used to watching the clock as you fall asleep, or if you toss and turn to see what time it is, then you should put the clock out of sight. If you need to wake up regularly, hide your alarm clock in a drawer with the timer set. Myth 4: “Snooze is not beneficial” theory. Modern society, especially in the city, people are under pressure from all aspects of the increasing, “sleep overdraft” has become a city epidemic, therefore, a nap in the afternoon, is undoubtedly a good way. Some large foreign companies even specialize in “snooze area” to help employees in the shortest possible time to restore physical strength, to maintain the best state of mind. The best time to nap during the day is between 1-3 pm.