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Does single dose salmeterol affect exercise capacity in asthmatic men?

W Robertson1, J Simkins, S P O'Hickey

  • 1Dept of Respiratory Physiology, Birmingham Heartlands Hospital, UK.

The European Respiratory Journal
|November 1, 1994
PubMed
Summary
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Salmeterol, a long-acting beta-agonist, did not enhance athletic performance or cardiorespiratory responses in asthma patients during exercise. This study found no ergogenic effect from salmeterol compared to salbutamol or placebo.

Area of Science:

  • Exercise Physiology
  • Respiratory Medicine
  • Pharmacology

Background:

  • Asthma patients often experience exercise limitations.
  • Long-acting beta-agonists (LABAs) like salmeterol are used for asthma management.
  • The ergogenic potential of LABAs in asthmatic athletes is not fully understood.

Purpose of the Study:

  • To investigate the effects of salmeterol on athletic performance in asthma patients.
  • To compare salmeterol's impact on cardiorespiratory responses and endurance capacity against salbutamol and placebo.
  • To assess potential ergogenic effects of salmeterol during maximal and endurance exercise.

Main Methods:

  • Eight male asthma patients underwent maximal cycle exercise tests and endurance tests.
  • Participants received 50 micrograms of salmeterol, 200 micrograms of salbutamol, or a placebo.

Related Experiment Videos

  • Measurements included cardiorespiratory responses, forced expiratory volume in one second (FEV1), endurance capacity, and blood lactate levels.

    • Main Results:

    • Both salmeterol and salbutamol improved pre- and post-exercise FEV1 compared to placebo.
    • No significant differences were observed in cardiorespiratory, hemodynamic, or subjective responses between treatments.
    • Endurance capacity and maximal exercise performance did not change with salmeterol, salbutamol, or placebo. Blood lactate was higher with salbutamol but not salmeterol.

    Conclusions:

    • A single dose of salmeterol does not significantly affect cardiorespiratory or metabolic responses during exercise in asthma patients.
    • Salmeterol does not demonstrate an ergogenic effect on maximal or endurance exercise performance in this population.
    • While improving lung function, salmeterol does not enhance athletic capacity in individuals with asthma.