Pain in the middle of the chest when exerting force usually results from two causes: first, thoracic costochondritis, and second, sternitis of the sternum. Both of these conditions are sterile inflammatory conditions near the sternum and can be caused by frequent chest irritation from exertion, or by local injury, cold, or frequent friction. If the symptoms are severe, there will also be local induration, swelling, skin flushing, increased skin temperature and other manifestations of redness, swelling, heat and pain. The pain usually occurs when moving things with force, or when breathing deeply or coughing hard. If you want to treat it, you can usually apply topical ointments to reduce swelling and pain, invigorate blood circulation and remove wind and dampness, commonly used ones are compound Nanxing pain relief ointment, pain-relieving paste and so on. It can also be treated with oral non-steroidal anti-inflammatory drugs, which can relieve local sterile inflammation and also have a pain-relieving effect, commonly used are ibuprofen, diclofenac sodium, celecoxib and other drugs.