Patients in the sit-up exercise body, causing pain in the chest, may be due to chest muscle strain or sprain, caused by this in the chest muscle contraction pain symptoms, in this case the patient is recommended to carry out local hot compresses, massage, to relieve this symptom. Usually, attention must be paid to avoid strain or sprain of the chest muscles again, which can effectively relieve this painful symptom. It may also be due to the patient in the process of sit-ups, due to the chest muscles rubbing against each other, thus causing the onset of pleurisy, which may cause chest pain. It is recommended that the patient go to the hospital in time for relevant tests, such as blood tests and ultrasound of the chest, to clarify the diagnosis of pleurisy, and after the diagnosis is clear, symptomatic treatment must be actively carried out to effectively relieve the situation.