Cross-country skiers who competed in a 90-km race in Sweden showed heightened risk for the development of arrhythmias, according to results from a large cohort study. The findings may shed light on how very high levels of physical activity pose risks for arrhythmia.
Researchers identified participants in the Vasaloppet (n=52,755; 10% women), one of the world’s most challenging cross-country skiing events, between 1989 and 1998. Follow-up through 2005 revealed that risk for developing AF or bradyarrhythmia was higher in skiers who competed in the race more often or finished with faster times.
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