Personally, I think that the chest muscles and abdominal muscles at home mainly rely on push-ups and sit-ups, and the training of chest muscles mainly depends on push-ups. It is recommended to train once a day, about 20 times in each group, and practice three groups at a time. When practicing push-ups, you should master the skills of muscle retraction and extension. It takes about 3 seconds for the body to get up when it goes down, so that the muscles can be fully stressed and the stimulation effect can be achieved. With the gradual deepening of practice, or take a chair, put your feet on it, and let your body lean down, so that you have more strength and should be able to keep your chest muscles. Let's start with push-ups. The starting posture is to lie flat on the mat, so that the knees are at a 90-degree angle, the feet are on the ground, and the toes are up; Put your hands under your head, or cross your hands on your chest to keep your chin at a certain distance from your chest. Bend your abdomen so that your back is just lying on the air cushion. Curl the abdominal muscles forward, make the body curl as much as possible, make the back form a certain angle with the air cushion, and relax the foot muscles. Then slowly relax the abdominal muscles, so that the body drops and returns to the initial state. During the whole process, please keep your chin at a certain distance from your chest and put your hands on it.