1, pay attention to posture. When walking, your back is straight and your breasts will naturally stand up; When sitting, you should also hold your head up and hold your chest high; Take a lateral or supine position when sleeping, and don't lie prone.

2. Take a deep breath. Doing deep breathing exercises several times every morning or evening can fully develop the chest.

3, do a good job in chest fitness. Mainly to strengthen chest muscle exercise, such as doing more chest expansion exercises or chest expansion aerobics, push-ups and so on.