From school to work, many time-consuming and laborious fitness programs have been abandoned by us, but sit-ups have been persisted by many people. Indeed, this sport does not need professional equipment. Just do a few when you think of it, and you can feel the tension of abdominal muscles and back muscles immediately, and the effect is very obvious. Recently, however, a sit-up person asked me that after doing several sit-ups, I often feel my neck hurts. Why? How to prevent it? I carefully observed their movements and finally found the answer to the question. It turns out that these sit-ups are all trained with arms stretched backwards and hands crossed behind the head. At the beginning, they looked relaxed and moved quickly, but after a while, the speed slowed down obviously and the whole movement was very difficult. So, with trembling arms, they tried their best to pull their heads and necks forward and bend the whole trunk forward to make up for the lack of abdominal muscle strength. Because of this, the soft tissues of cervical spine and neck bear strong buckling stress. Once the stress exceeds the limit that the cervical vertebra or the soft tissue of the neck can bear, it will lead to neck strain or slight injury, causing neck pain. In order to prevent this kind of neck pain, practitioners should pay attention to avoid replacing waist and abdomen with arms during training. In particular, the abdominal muscles are weak, so it is not appropriate to use the posture of extending the arms backward, but to extend the arms horizontally forward for training, which can reduce the difficulty of movement and avoid head and neck strain. Another point that needs to be emphasized is that when doing sit-ups, too fast speed will not improve the exercise effect. Only by slowing down the exercise rhythm properly can we avoid the physical discomfort caused by excessive fatigue and enhance the training effect of abdominal muscle strength. What does the hot ranking take to keep my estrogen and enjoy sex in abnormal times? Focus on travel skin care, five kinds of mother-in-law and daughter-in-law seize the "golden" moment of pregnancy and six frontier viewpoints of pregnancy psychology. Is your baby an extraordinary child? Don't refuse yoga. Outdoor sports popular this spring are like water, and health is the source of review and slimming. FM Happy Baby Health is under control.