Medicine & Science in Sports & Exercise · 2010 · 87 citations · 23 references
we found that high physical activity was associated with a lower risk of contracting URTI for both men and women. In addition, we found that highly stressed people, particularly men, appear to benefit more from physical activity than those with lower stress levels.
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Physical activity and immune function in elderly women
David C. Nieman, Dru A. Henson, G. Gusewitch et al. · Medicine & Science in Sports & Exercise · 1993 · 402 citations