EILO vs. Asthma: How to Tell the Difference

For many athletes, the experience is frustrating: you’re pushing hard in practice or competition and suddenly feel like you can’t get air in. The throat or chest may feel tight, breathing may become noisy, and performance may drop.

Often, the first diagnosis given is asthma. But for a growing number of athletes, the real issue is actually exercise-induced laryngeal obstruction (EILO), also commonly referred to as vocal cord dysfunction or paradoxical vocal fold motion.

Although these two conditions can feel similar, they involve very different parts of the airway and require different treatment approaches. Understanding the difference is key to getting the right help and returning to peak performance. Let’s explore the difference between EILO vs. asthma.

What is EILO?

EILO occurs when the larynx (voice box) temporarily narrows during intense exercise. Instead of remaining open to allow air to flow freely, structures in the larynx narrow or partially close, making breathing difficult. This narrowing happens during high-intensity exercise and usually improves quickly once the athlete stops.

EILO is most commonly seen in:

• Runners
• Swimmers
• Soccer and field sport athletes
• Highly competitive or elite athletes
• Adolescents and young adults

It is not dangerous, but it can significantly impact athletic performance and confidence.

What is asthma?

Asthma is a chronic inflammatory condition of the lungs that causes the airways in the lower respiratory tract (bronchi) to narrow.

In athletes, exercise can trigger symptoms of exercise-induced bronchoconstriction, which cause coughing, wheezing, and difficulty breathing.

Unlike EILO, asthma affects the lungs, not the throat.

EILO vs. Asthma Symptoms

Common Symptoms of EILO	Common Symptoms of Asthma
Athletes with EILO often report: Sudden difficulty breathing during intense exercise A feeling of airway tightness in the throat Noisy breathing or a high-pitched sound Needing to stop exercise suddenly Quick recovery once activity stops Many athletes describe it as feeling like “breathing through a straw.”	Asthma symptoms often include: Chest tightness Wheezing Coughing Shortness of breath Fatigue during or after exercise Symptoms may persist after activity ends.

Why is EILO often misdiagnosed as asthma?

Because both conditions involve breathing difficulty during exercise, athletes with EILO are frequently treated for asthma first.

However, if:

• the use of inhalers don’t improve symptoms
• breathing difficulty happens most commonly at high-intensity effort
• symptoms resolve quickly when stopping exercise

EILO may be the underlying issue.

In many cases, athletes can actually have both conditions at the same time, which makes proper evaluation even more important.

When to seek an evaluation

You may want to consider evaluation if you or your athlete:

• Struggle to breathe during intense exercise
• Have asthma treatment that isn’t working
• Experience noisy breathing during activity
• Feel throat tightness while exercising

Identifying the correct diagnosis can make a dramatic difference in both breathing and performance.

The bottom line

While EILO and asthma can feel similar, they are different conditions affecting different parts of the airway. Getting the right diagnosis is the first step toward effective treatment—and toward helping athletes breathe easier and perform at their best.

Contact us today to learn more!