As the weather gets warmer day by day, outdoor sports are becoming more and more popular. In the process of outdoor sports, a common but painful small problem may quietly stalk up, it is commonly known as “off-air”, professionally known as “chest burst injury”. As the temperature is not very high, and many times our preparatory activities are not sufficient, too strenuous exercise will make our chest respiratory muscle tension to produce spasm, and eventually produce a dull pain in the chest and ribs, this pain is particularly obvious when breathing deeply. Such a small problem in addition to pain is generally no big deal, but greatly affect people’s mood and quality of life, so there is no good way to self-relieving it? 1. Breath-holding pat After a deep inhalation, hold your breath while patting the painful area with an empty palm 3-5 times, then exhale slowly and repeat 3-5 times. 2. Body side exercise We can also use self-pulling method to relieve spasm. Inhale deeply and hold your breath while raising your arm on the painful side and bending your body to the other side, which is the common body side exercise, and repeat 3-5 times.