The reason for the weight gain is
1. Fat is converted into muscle. Although it is heavy, you will feel thin when you put on clothes, because the muscle with the same weight is only a quarter of the fat volume.
2. After water loss exercise, the body also needs water to accelerate metabolism, so it is likely that water is heavy.
3. If you are lucky enough to develop a little muscle, then the muscle has a good water retention ability, which will make your skin firm and shiny, so this kind of water is particularly precious.
In short, increasing muscle and reducing fat is our goal and a beautiful pursuit. Don't just look at the change of weight, learn to look at the change of body fat.