The inability to catch the breath, in medical terms, is called “shortness of breath”, may be related to strenuous exercise, lung disease, heart disease and other reasons. 1. Strenuous exercise: under normal circumstances, after strenuous exercise, the sympathetic nerves are excited, which may cause shortness of breath, panic and other symptoms. 2. Lung diseases: such as chronic obstructive pulmonary disease (COPD) and other lung diseases, shortness of breath after activity can occur due to the impact of lung function. 3. Heart disease: heart disease such as heart failure can lead to lung stagnation, affecting lung function, shortness of breath can occur. It is recommended that people who can not catch their breath go to regular hospitals in time, to clarify the cause, and standardize the treatment under the guidance of the doctor, so as not to delay the condition.