Exercise-Induced asthma is when your airways in your lungs narrow as you exercise or play a sport. The symptoms are: wheezing, coughing, and shortness of breathe. People with exercise-induced asthma usually use an inhaler 15 minutes before working out or playing a sport. Some people even use their inhaler during exercise. This all happens because when you exercise your body demands more oxygen, so you breathe faster and deeper. You usually would breathe in through your mouth which causes the air to be dryer and cooler, but if you would breathe through your nose it wouldn’t be as cold and dry. The dry and cold air is one of the main triggers for airways narrowing in your lungs. So, if you have exercise-induced asthma and breathe through your mouth you will be more likely to have an asthma attack.