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Why Can't I Breathe When I Exercise?

Sep 01, 2025
Why Can't I Breathe When I Exercise?
Struggling to catch your breath during exercise? It could be more than just being out of shape. Learn about the surprising reasons why you might be having trouble breathing and what you can do about it.

Feeling breathless during a workout is a common experience, but it’s not always a sign that you’re just out of shape. While it's normal to breathe harder when you exert yourself, persistent difficulty breathing could be a sign of an underlying issue. 

At Advanced Allergy, Asthma, & Immunology Center PA in San Antonio and Schertz, Texas, our board-certified lead allergist, Patricia Gomez-Dinger, DO, and the team can help you pinpoint the cause of your breathing troubles.

Understanding exercise-induced breathing issues

When you exercise, your body demands more oxygen, causing your breathing rate to increase. However, if you consistently find yourself gasping for air, it might be due to a condition known as exercise-induced bronchoconstriction (EIB). 

According to the American College of Allergy, Asthma and Immunology (ACAAI), EIB is a narrowing of the airways in the lungs that’s triggered by strenuous exercise. It can cause symptoms like shortness of breath, coughing, wheezing, and chest tightness during or after a workout. While many people with asthma have EIB, it can also affect those without a history of asthma.

Other potential causes of breathlessness

Besides EIB, other factors can contribute to breathing difficulties during exercise. These can range from being out of shape (deconditioned) to more serious heart and lung conditions. A 2018 article from the University of Utah Health highlights that shortness of breath on exertion, or dyspnea, can be caused by a variety of factors, including stiff hearts, chronic lung disease, and obesity. Be sure to pay attention to your body and not dismiss persistent symptoms.

What you can do about it

If you're struggling to breathe during exercise, the first step is to talk to one of our healthcare professionals. At Allergy, Asthma, & Immunology Associates, we can perform tests to determine if you have EIB or another underlying condition. Depending on the cause of your breathlessness, we may recommend:

  • Using an inhaler before exercise: to help prevent your airways from narrowing
  • Warming up properly: to help prepare your lungs for more strenuous activity
  • Practicing breathing exercises: e.g., techniques like pursed-lip breathing to help control your breathing and improve lung efficiency
  • Avoiding triggers: e.g., wearing a scarf or mask over your mouth and nose to avoid triggers like cold, dry air

Don't let breathing problems hold you back from being active. To learn more about what might be causing your shortness of breath during exercise, call 210.499.4824 today to schedule a visit at the office closest to you or click here to request an appointment online.