Endurance training + proper diet = perfect abs
Crunches are one of the best exercises for building abdominal muscles.
When you first start exercising, do sit-ups for about 15 minutes each time, and then gradually extend the exercise time.
Practice more than 3 times a week.
Diet: Mainly vegetables and fruits, with meat intake controlled at about 30%; consume more high-protein foods, control fat intake, especially dinner, try to eat as little as possible High-fat foods