
Sick after a marathon: a meta-analysis finds an 18% higher risk of a cold, not an βopen windowβ
A classic study of the Los Angeles Marathon found colds in 12.9% of finishers versus 2.2% of runners who did not race. A 2024 meta-analysis that adjusted for the length of follow-up whittled this down to +18%. We look at where the post-race sniffles come from and what actually lowers the risk.










