After doing sit-ups, many people will find that they are obviously exercising their abdominal muscles to do sit-ups, but they have no feeling in their abdomen and their neck hurts. This is because when we do sit-ups, although we habitually hold our heads with our hands, there is no support from abdominal strength. When we finished the action, we stood up completely with our heads pulled by our arms. This situation puts too much pressure on the cervical spine, which may even lead to cervical spondylosis if you are not careful.
Another problem that we often talk about is that sit-ups will hurt your waist. The key point of sit-ups is to make the muscles of the body contract inward through abdominal strength, while the muscles of the back spine contract outward at the same time, which will cause waist pain and discomfort after repeated stimulation of the back.
In addition, when the abdominal muscles contract, because the trunk supports the whole body, the waist always stays straight and the muscles are always stimulated, so the waist pain after exercise will be unbearable.
Also, because we often fix our legs when doing sit-ups, we will unconsciously use leg strength during exercise, which will greatly reduce the exercise effect of sit-ups on abdominal muscles, because the strength provided by leg muscles is too great in this process, which reduces a lot of abdominal strength.