People who sleep less than 6.5 hours a day are more likely to get obese. Many studies have pointed out that lack of sleep may cause the body to secrete more "hunger hormones," causing people to overeat and cause obesity. Some people couldn't hold it in the middle of the night and they stayed up late. Those with a firm will will insist on eating until breakfast. However, the results are the same, you will eat more food than usual, but you do not know.