Skip to content
My WebMD Sign In, Sign Up

Asthma Health Center

Font Size

The Athlete's Guide to Exercise-Induced Asthma

Exercise-induced asthma shouldn't keep you from working out. Here's how to keep your symptoms under control.
By
WebMD Feature

From weekend warriors to superstars, all types of athletes experience exercise-induced asthma. They include world-class competitors like NFL star Jerome "The Bus" Bettis and six-time Olympic gold medalist swimmer Amy Van Dyken.

But just what is exercise-induced asthma, why does it happen, and how can it be managed?

Recommended Related to Asthma

Asthma Treatments for Children

Based on your child's history and the severity of asthma, his or her doctor will develop a care plan, called an "asthma action plan." The asthma action plan describes when and how your child should use asthma medications, what to do when asthma gets worse, and when to seek emergency care for your child. Make sure you understand this plan and ask your child's doctor any questions you may have. Your child's asthma action plan is important to successfully controlling his or her asthma. Keep it handy...

Read the Asthma Treatments for Children article > >

WebMD consulted the experts to find out the answers to these questions, as well as tips for controlling symptoms of exercise-induced asthma -- whether you're a casual athlete or a superstar.

What is Exercise-Induced Asthma?

Even many people who never experience asthma symptoms at other times have exercise-induced asthma, experts say.

"Exercise-induced asthma occurs in almost everyone who has chronic asthma, but there is a separate group of people who have what we call exercise-induced bronchospasm," says Timothy J. Craig, MD, chair of the American Academy of Allergy, Asthma and Immunology's Sports Medicine Committee.

These people, explains Craig, don't have what is considered "true" asthma. They don't have inflammation in their lungs. Nor do they experience symptoms when exposed to common triggers, like animals, pollen or mold.

"So unlike most people who have asthma and get exercise-induced symptoms, these individuals don't have true asthma, but when they exercise, they experience the symptoms of asthma," Craig tells WebMD.

Exercise-induced asthma, experienced by up to 13% of the U.S. population, occurs when the airways narrow, making breathing difficult. Why some athletes have exercise-induced asthma and others don't isn't entirely clear.

"The causes vary, but are usually associated with loss of heat or water, or both, from the lungs during exercise, because of the increased ventilation of dry and cool air," says Michael G. Miller, EdD, a spokesperson for the National Athletic Trainers Association.

People with exercise-induced asthma have airways that are overly sensitive to sudden changes in temperature and humidity, especially when breathing colder, drier air, according to the American Academy of Allergy, Asthma and Immunology (AAAAI).

During strenuous activity, people tend to breathe through their mouths. Mouth breathing allows cold, dry air directly into the lungs, without benefit of the warmth and moisture that nose breathing supplies. As a result, air is moistened to only 60-70% relative humidity. Nose-breathing, meanwhile, warms and saturates air to about 80 to 90% humidity.

The symptoms of exercise-induced asthma are similar to those of chronic asthma, explains Miller. They include:

  • Shortness of breath.
  • Tightness in the chest.
  • Cough or wheezing.
  • Decreased performance.

These symptoms usually begin after several minutes of exercise and peak about 10 minutes into a workout, or sooner.

Preventing and Treating Exercise-Induced Asthma

How can these symptoms be prevented and treated, so asthma doesn't become an excuse to avoid exercise?

Here are some tips for reducing the symptoms of exercise-induced asthma:

  • Be sure to warm up before working out. "A proper warm-up for at least 10 minutes with a gradual increase in intensity can help prevent symptoms," says Miller.
  • Take precautions when it's chilly outside. "If it's cold, cover your mouth and nose to warm the air," says Miller. Or "move to indoor areas that are well-ventilated and have humidified, warm air."
  • Use an inhaler. Inhalers contain albuterol, a beta-agonist bronchodilator. This class of drugs is effective in 80% to 90% of people with exercise-induced asthma. As a preventive therapy, it should be taken about 15 minutes before exercise. The effects can last for up to four to six hours. Your inhaler can also be used to relieve asthma symptoms after they flare.

If warming up and using albuterol don't prevent symptoms, there may be more to your exercise-induced asthma than you think.

When Is Your Asthma Worse?

When Is Your Asthma Worse?

Take the WebMD Asthma assessment to get Personalized Action Plan

Start Now

Today on WebMD

Distressed woman
Slideshow
Woman holding an asthma inhaler
Article
 
Get Personalized Asthma Advice
Health Check
asthma overview
Slideshow
 
Los Angeles skyline in smog
Slideshow
man in a field with allergies
Slideshow
 
Woman holding inhaler
VIDEO
Slideshow Allergy Myths and Facts
Slideshow
 

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

Man outdoors coughing
Article
Lung and bronchial tube graphic
Article
 
10 Worst Asthma Cities
Slideshow
runner
Article