1. Increase digestive burden: After fitness, the body needs to consume a lot of energy to restore muscle and cardiopulmonary function. Eating it immediately may bring extra burden to the digestive system and affect the recovery of the body.

2. Affect nutrient absorption: After exercise, the body needs to absorb enough nutrients to help muscle repair and growth. Eating it right away may affect the absorption of nutrients and reduce the exercise effect.

3. Weight gain: If you eat high-calorie food immediately after fitness, it may lead to excessive calorie intake, which may lead to weight gain.

4. Affect sleep: Eating immediately after exercise may cause gastrointestinal discomfort and affect the quality of sleep.

It is recommended to wait for a while after fitness. It is generally recommended to wait for 30 minutes to 1 hour. This period of time can gradually restore the body to a state of rest, which is helpful for the digestion and absorption of nutrients. At the same time, choosing healthy food, such as protein, balanced combination of carbohydrate and fat, is conducive to the recovery of the body and the increase of muscle.