
However, when people exercise, they tend to breathe air through their mouth more than through their nose, which can cause dry, cool, and particle-filled air to go directly to the lungs, which can cause respiratory irritation that leads to
coughing.
Coughing is the body’s natural response to clear the airway of unwanted debris, including
mucus build-up. However, coughing and mucus buildup from respiratory irritations usually discontinue shortly after exercise.