This is because when you exercise, you consume more energy every day and naturally eat more. When you stop exercising, you don't exercise as much every day as before, but your appetite doesn't decrease. In this way, the energy you consume every day is not consumed as before when you maintain a high level of exercise, but becomes fat and quickly accumulates on you. Store it in your waist, legs and buttocks, which are particularly prone to obesity. This is why many retired athletes gain weight quickly. Even some people can't control their appetite and become super obese.
So if you want to lose weight, you should not only increase your exercise, but also control your appetite. Shut your mouth and spread your legs. This is the most correct way to lose weight and keep fit. There is no way to really lose weight without controlling appetite and blind exercise.
Especially when you haven't exercised for a while, you must pay special attention to diet management. Let your body quickly reach balance. Don't let overeating ruin your health, it's the most expensive way. This movement must be gradual and lasting. Don't be sudden and violent for a while, and exercise for a while. This is the most harmful behavior to your health. Don't do this.
Usually you can learn more about fitness knowledge and some knowledge about diet management. Let yourself not only have scientific exercise, but also have a scientific diet pattern.