This condition is also called exercise-induced bronchoconstriction (EIB), which is different from chronic asthma. Chronic asthma symptoms can be triggered by a variety of factors including allergies. Those triggers cause the airways in your lungs to become intermittently inflamed and narrowed, making breathing difficult. In exercise-induced asthma, or EIB, the air passages in your lungs tighten as a result of intense exercise. That makes it hard for you to breathe. You may have shortness of breath, wheezing, and coughing that are similar to EILO. EIB is much more common in people who already have chronic asthma. However, even people who don’t have asthma can experience EIB. One difference between EILO and EIB is that symptoms of EIB can worsen for 10 to 20 minutes after you stop exercising. Cold, dry air, pollution, and other environmental factors can trigger EIB. However, EILO occurs during exercise without other factors triggering symptoms. Up to 30% of patients with exercise-induced asthma may also have EILO.