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Can Med Assoc J. 1980 May 24; 122(10): 1141–1142.
PMCID: PMC1801992

Heat injuries in Canadian mass participation runs.


In two Canadian runs with a total of approximately 2900 participants 26 people collapsed with heat injury and were taken to hospital. All were relatively young (13 to 38 years old). A retrospective survey showed that all were novices to 10-km races and that many had collapsed even though they had consumed fluids before and during the run. A review of etiologic factors suggested that the extremes in the Canadian climate, which preclude heat acclimatization in the spring and early summer, may be an important influence on the incidence of heat injury.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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  • Sutton J, Coleman MJ, Millar AP, Lazarus L, Russo P. The medical problems of mass participation in athletic competition. The "City-to-Surf" race. Med J Aust. 1972 Jul 15;2(3):127–133. [PubMed]
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  • Wyndham CH, Strydom NB. The danger of an inadequate water intake during marathon running. S Afr Med J. 1969 Jul 19;43(29):893–896. [PubMed]
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