A constant lack of sleep prevents you from losing weight. The fact is that lack of sleep makes self-control difficult, and a person begins to look at food as a source of pleasure. In addition, it increases the feeling of hunger, the desire for sweets and other high-calorie foods, the doctor told Gazeta.ru. Roe". Also, a chronic lack of sleep does not allow a person to exercise normally. As a result, a person ends up in a vicious circle: he wants to eat more, but he has less and less energy left for training.