Chest pain when performing chest expansion exercises is usually related to movements and activities, and can be ruled out as a cardiac problem, usually a thoracic soft tissue problem. There are two common causes: first, it may be caused by trauma, such as accidental collision or crushing injury, as well as lifting heavy objects with force, which may lead to soft tissue strains, will appear chest pain. The pain will appear or aggravate when you take a deep breath, cough and move things with force. Secondly, there is aseptic inflammation of the cartilage near the chest, commonly chest, costochondritis, costochondritis and other conditions, in addition to pain, localized pressure pain is more obvious. If the inflammation is serious, there will also be localized skin flushing, elevated skin temperature, swelling and other redness, swelling, heat and pain.