Does anyone know exactly what effects asthma and injuries have on the ability to run long distance and short distance. I have quite mild asthma that's not to bad. I have an occasional cough and always shortness of breathe. On top of asthma I have a lot of injuries and other things as a result of sprinting. I have callus, ingrown toenail, omnipresent fatigue, and a pulled hip flexor. How long must I rest or does my injuries affect my running at all?