One of the most common medical questions we receive at our dive center in Phuket is: "I have asthma. Can I still learn to freedive?"
Because freediving involves holding your breath and exposes your lungs to immense physical pressure, it is natural to be concerned. The short answer to whether you can dive with asthma is: It depends entirely on the severity of your condition and the approval of a qualified diving doctor.
Here is what you need to know about freediving with asthma, the potential risks, and the steps you must take before getting in the water.
The Risks: Why Asthma and Diving Can Clash
Asthma is a chronic condition that causes the airways in the lungs to become inflamed and narrow, often producing extra mucus. This makes breathing difficult and can trigger coughing or wheezing.
In freediving, there are several unique factors that can trigger an asthma attack:
- Physical Exertion: Swimming against a current or kicking heavily to the surface can trigger exercise-induced asthma.
- Cold Water: Inhaling cold air or jumping into cold water is a known asthma trigger (though luckily, the water in Phuket is a balmy 29ยฐC!).
- Stress and Anxiety: The mental challenge of holding your breath or being in deep water can trigger stress-induced asthma in some individuals.
Furthermore, if an asthma attack occurs underwater, the narrowed airways can trap air in the lungs. As a freediver ascends, the air expands due to decreasing water pressure. If that air cannot escape because of an asthma blockage, it can cause severe lung injury (pulmonary barotrauma). This is one reason why safe, gradual depth progression and the buddy system matter so much.
Who Can and Cannot Dive?
Historically, asthma was an absolute contraindication for any form of diving (scuba or freediving). Today, the medical community takes a more nuanced approach.
- Severe / Uncontrolled Asthma: If you require a daily inhaler, experience frequent attacks, or have asthma triggered by exercise or cold, you will likely not be cleared to dive. The risks are simply too high.
- Mild / Childhood / Well-Controlled Asthma: If you had asthma as a child but have outgrown it, or if you have a very mild case that hasn't required an inhaler for years and isn't triggered by exercise, you may be cleared to dive.
The Mandatory First Step: See a Diving Doctor
No reputable freediving school will allow you to dive without a medical certificate if you check "Yes" to asthma on the medical questionnaire.
You cannot self-diagnose your readiness. Before you book a course, you must visit a physicianโideally a specialist in hyperbaric or diving medicine. They will conduct spirometry (lung function) tests to see how your lungs perform under stress and determine if your airways are clear enough to handle the pressure changes of freediving.
The Silver Lining: Breath-work Benefits
If your doctor does clear you to dive, you might actually find that the sport helps your condition. Freediving places a massive emphasis on diaphragmatic breathing, relaxation, and mindfulness. Many freedivers with mild, medically-cleared asthma report that the breathing exercises and lung stretches they learn in their Wave 1 Course actually help them manage their breathing better on land! If you want to start gently, a shallow trial freediving session is a good first step once you have medical clearance.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a physician regarding your health and fitness to dive.