Scientists from the National Aeronautics and Space Administration (NASA) of the United States have confirmed that muscles that stop exercising degenerate at an alarming rate. If a person does not exercise for three days, the maximum strength of his muscles will disappear1/3; The muscles that have been exercised must be exercised again within 48-72 hours in order to establish the desired physical effect. In other words, the good effect of promoting human metabolism can only last for 2-3 days at most. If it exceeds, the human function will be greatly reduced. It can be seen that you can achieve your goal by exercising 3-4 times a week for 30-60 minutes each time. Why? Why? The reason is very simple, because the human body can't store a certain vitamin, and it must be taken from food every day or supplemented by other means to meet the needs of the body. Similarly, the human body can't store the exercise effect of a certain state, and it must adhere to the law in order to improve the body function and achieve the purpose of developing muscles and strengthening physique.

Ways to practice abdominal muscles:

Air boarding

You can lie on your back on the floor with your lower back close to the ground. Put your hands on your head and open your arms. Lift your legs and climb on the bike slowly. Exhale, lift your upper body, touch your left knee with your right elbow, hold your posture for 2 seconds, and then restore. Touch the right knee with the left elbow again, hold it for 2 seconds, and then slowly return to the starting position.

Traditional belly roll

When practicing, you can lie on your back on the floor with your lower back close to the ground. Put your hands on your head and open your arms. Put your legs flat on the ground and bend your knees. The chin shrinks to the chest, contracts the abdominal muscles, exhales, lifts the upper body, keeps the lower back off the ground for 2 seconds, and then slowly returns to the starting position.

Abdominal roll of fitness ball

It is recommended to lie flat on the fitness ball, put your feet flat on the ground, put your hands on your head and open your arms. Reduce the chin to the chest, exhale, contract the abdominal muscles, raise the upper body about 45 degrees, hold it for 2 seconds, and then slowly return to the starting position. In order to keep balance, your feet can be separated more.