causes of shortness of breath during exercise
Overview. Feeling short of breath can have several causes. Exercise and strenuous exertion often causes difficulty breathing, especially if you are out of shape. Asthma, anxiety and COPD, or chronic obstructive pulmonary disease, may also cause shortness of breath. If you have shortness of breath that can't be explained by exertion or physical activity and affects your ability to function, you should consult a doctor immediately.