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Ambulatory electrocardiography in squash players
British Heart Journal
|October 1, 1983
Summary
Squash significantly elevates heart rate and can trigger cardiac arrhythmias, especially in older players. Medical screening is advised before starting the sport, particularly for those over 40.
Area of Science:
- Cardiology
- Sports Medicine
- Exercise Physiology
Background:
- Squash is a popular, high-intensity sport.
- The cardiovascular demands of squash are not fully understood.
- Cardiac arrhythmias during or after exercise can pose health risks.
Purpose of the Study:
- To assess the cardiovascular effects of squash match play.
- To investigate the incidence of cardiac arrhythmias during and after squash.
- To determine the physiological strain of squash on the myocardium.
Main Methods:
- Ambulatory electrocardiography was performed on 21 healthy male squash players (aged 23-43).
- Electrocardiograms were analyzed for heart rate and rhythm changes before, during, and after match play.
- Comparison with maximal treadmill exercise testing was conducted.
Main Results:
- Squash play increased heart rate to approximately 80% of predicted maximum for the game's duration.
- Ventricular arrhythmias were detected in 7/21 subjects during play and 7/21 post-exercise.
- These arrhythmias were not observed during subsequent maximal treadmill tests.
Conclusions:
- Squash is a physiologically demanding sport causing significant myocardial strain and potential for cardiac arrhythmias.
- Individuals with pre-existing cardiovascular conditions are at higher risk.
- Medical advice is crucial before starting squash, especially for those over 40, as arrhythmias may not be predicted by standard screening.