It depends on how much you consume every day. Even if you are in a daze or lying down for a day, you will naturally consume hundreds of calories. It is unrealistic to lose one kilogram a day, but it may not last too long, which may easily lead to sudden death. A man in America died like this. He lost a lot of weight because he was a soldier, but his death was related to your weight. If it is too different from the standard weight, it is sometimes possible to lose 10 kg a month. It's bad for the heart. If you lose 5~6kg in March, which is worse than the standard weight 1~20 kg, the effect will be good, and you will not be very tired, that is, you should strictly control your diet. Drinking more water during weight loss is good for your health, but don't drink too much during exercise, which is easy to dilute blood shock, up to1L. You can drink more after you stop exercising.