Let's learn about the sit-ups first. When doing sit-ups: when lying on your back, you need to raise your hands and put your legs together. At the same time, you can use the contraction of abdominal muscles and swing your arms forward to quickly complete the sitting posture; In addition, the upper body continues to move forward, with both hands touching the foot surface and bowing at the same time; Finally, return to the sitting position. Repeatedly repeating this set of actions also forms sit-ups.
In most people's impression, sit-ups can exercise abdominal muscles, but in fact, sit-ups can't exercise abdominal muscles well, which will also cause harm to the human body. Our misunderstanding of it is that it is not standard to do sit-ups at school. We think that bending over can stimulate abdominal muscles, but we don't know that sit-ups with abdominal strength will do great harm to the spine and cervical spine.
This is also the reason why many fitness coaches don't recommend you to exercise your abdominal muscles through sit-ups training, not to mention the poor effect. His harm to the human body is also one of the reasons. And doing sit-ups for a long time will find that it has little stimulation to the abdomen and other muscles, because its stress points are mainly in the anterior thigh muscles and iliopsoas muscles.
This kind of training can't effectively develop abdominal muscles. Usually the coach will let you exercise your abdominal muscles through belly roll training. Abdominal contraction is a pure abdominal muscle movement, and the whole movement relies on abdominal muscles. Sit-ups before belly-up training are not worth mentioning, so the coach will not recommend you to practice abdominal muscles through sit-ups.