Understanding Asthma in Elite Athletes (Part I)

In today’s episode, we’re delving into a common respiratory condition affecting athletes—Asthma. Both asthma and exercise-induced asthma (EIA) are notably more common among elite athletes than in the general population. It’s not unusual to see Olympians relying on their inhalers during competitions, as asthma is the most prevalent chronic condition among Olympic athletes. A study spanning five Summer and Winter Olympic Games from 2002 to 2010 found that around 8% of participating athletes had asthma. A more recent study from 2022, focused on European athletes at the Summer Olympics, revealed that 16.5% were affected by asthma. Research consistently shows that asthma is especially common in endurance sports like swimming, rowing, and cycling, as well as winter sports such as cross-country skiing and biathlon. Why do some elite athletes develop asthma or EIA? While the exact cause isn’t fully understood, in this episode, we’ll explore the triggers of the condition, examine its characteristics, and discuss effective management strategies for athletes—all from a clinical perspective. In this episode we discuss:  Topics Covered: Difference Between Asthma and Exercise-Induced Bronchospasm (EIB): Asthma is a chronic respiratory condition characterized by inflammation of the airways, while EIB refers specifically to the narrowing of the airways during or after exercise Symptoms of Asthma and EIB for Undiagnosed Athletes and Coaches: Common symptoms of asthma: Wheezing, shortness of breath, chest tightness, coughing, and difficulty breathing, especially during or after exercise. Common symptoms of EIB: Similar to asthma but primarily occurring during physical exertion. These include coughing, fatigue, poor performance, and shortness of breath during exercise. Sports and Exercises That Are More Likely to Trigger EIB: Endurance sports like long-distance running, swimming, and cycling, and winter sports such as cross-country skiing or ice hockey are more likely to trigger EIB due to sustained high ventilation rates and exposure to environmental factors (e.g., cold, dry air). Environmental Conditions and Their Role in Triggering EIB: Cold, dry air, air pollution, high pollen levels, and exposure to chlorine in pools can aggravate or trigger EIB. Athletes competing in harsh weather conditions or polluted environments are more prone to symptoms. Differentiating EIB from Poor Performance Due to Fatigue or Fitness Levels: Healthcare providers can evaluate an athlete’s history, symptom patterns, and environmental triggers to distinguish EIB from fatigue or poor fitness. Unlike fatigue, EIB symptoms typically follow a predictable pattern tied to exercise intensity or environmental conditions. Role of Spirometry and Pulmonary Function Tests in Diagnosing EIB: Spirometry measures lung function and can detect airway obstruction. A post-exercise spirometry test may help confirm EIB by showing a drop in lung function after exercise. Other pulmonary function tests, such as bronchoprovocation testing, can also aid in diagnosis. Resources:  Organizations: European Academy of Allergy & Clinical Immunology (EAACI) https://eaaci.org/  Allergy Asthma & Sports Workgroup https://eaaci.org/working-group/allergy-asthma-sports/  American Academy of Allergy Asthma & Immunology (AAAAI) https://www.aaaai.org/  Sports Exercise & Fitness Committee American College of Allergy Asthma & Immunology (ACAAI / College) https://college.acaai.org/  American Thoracic Society (ATS) https://site.thoracic.org/  European Respiratory Society (ERS) https://www.ersnet.org/  Asthma Allergy Foundation of America (AAFA) https://aafa.org/