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Specificity of exercise in exercise-induced asthma.

K D Fitch, A R Morton

    British Medical Journal
    |December 4, 1971
    PubMed
    Summary

    Swimming is the best exercise for individuals with asthma, as it significantly reduces the risk of exercise-induced asthma compared to running or cycling. This finding offers a safer exercise alternative for asthma patients.

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    Area of Science:

    • Pulmonary Medicine
    • Exercise Physiology
    • Allergy and Immunology

    Background:

    • Exercise can trigger asthma symptoms in susceptible individuals.
    • The type of exercise may influence the severity of exercise-induced asthma.
    • Understanding exercise-induced asthma is crucial for managing the condition.

    Purpose of the Study:

    • To compare the effects of running, cycling, and swimming on ventilatory function in asthmatic patients.
    • To determine which exercise modality is least likely to provoke exercise-induced asthma.
    • To provide evidence-based recommendations for exercise programs for individuals with asthma.

    Main Methods:

    • Forty asthmatic patients and 10 control subjects underwent 8-minute submaximal aerobic exercise sessions.
    • Exercise types included running, cycling, and swimming, performed in a randomized order.
    • Heart rates were monitored using biotelemetry to ensure consistent exercise intensity across modalities.

    Main Results:

    • No significant changes in ventilatory capacity were observed in control subjects after any exercise type.
    • Exercise-induced asthma occurred in 72.5% of running tests and 65% of cycling tests in asthmatics.
    • Swimming induced exercise-induced asthma in only 35% of asthmatic patients, with significantly smaller FEV(1) declines compared to running and cycling (P <0.01).

    Conclusions:

    • Swimming is associated with a lower incidence and severity of exercise-induced asthma in asthmatic individuals.
    • Running and cycling pose a higher risk for triggering asthma symptoms.
    • Swimming should be recommended as a preferred exercise modality for both children and adults with asthma.

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