Sit-ups mainly exercise abdominal muscles, but they have no exercise effect on the chest and can't have the effect of breast enhancement, but they still have an impact on the breast.

2 What is the effect of sit-ups on breasts? The main components of breast are fat and mammary gland. During the ups and downs of sit-ups, the breast will vibrate, which has a certain effect on the development of the breast, can help the breast become more compact, firm and elastic, and can also help reduce breast sagging to some extent.

Doing sit-ups to reduce the appearance of accessory breasts for a certain period of time can increase calorie consumption and burn excess fat in the body, thus helping to shape beautiful body curves, tighten body muscles and reduce the appearance of accessory breasts and invisible meat.

What are the benefits of doing sit-ups for girls? In addition to helping breasts become firmer, women actually have the following benefits:

Gynecological sit-ups are a way to develop the strength and extensibility of trunk muscles, which can exercise abdominal muscles well, and abdominal muscle tightening can better protect the organs in abdominal cavity. Women can exercise their groin by doing knees and sit-ups. There are many capillaries and acupoints in the groin. Do sit-ups to stimulate blood vessels and promote abdominal blood circulation, thus treating and relieving gynecological diseases. Doing sit-ups can also stretch back muscles, ligaments and spine, which has a regulating effect on the central nervous system.

To prevent constipation, sit-ups need to be combined with breathing methods, which can stimulate the peristalsis of the stomach during exercise, facilitate the discharge of excreta in the body, dredge the air in the stomach, and can prevent constipation well.

Sit-ups can help you lose weight to some extent, but sit-ups combined with other aerobic exercises can better play a role in losing weight and bodybuilding. Relatively speaking, simple sit-ups burn fat slowly, and you need to do more than 150 times each time to burn fat.

What should girls pay attention to when doing sit-ups? 1. Don't do sit-ups during menstruation. After all, the abdomen is the main stress part. When doing sit-ups during menstruation, the abdomen is compressed, which will make menstrual blood flow back from the uterine cavity to the pelvic cavity. At the same time, it may also lead to endometrial debris planted on the ovary, forming cysts; At the same time, the abdomen is squeezed or collided, which easily leads to ovarian rupture and lower abdominal pain.

Be careful not to put your hands on your head when doing sit-ups. Put your hand on your ear, then a little inward (about the middle of the back of your head, then a little outward), and put your hand there gently, not too hard.

3, sister paper that wants to lose weight, it is best to effectively combine sit-ups with other fitness methods in order to achieve a perfect weight loss effect.