Moderate Exercise Boosts Immunity and Reduces Infections

Moderate Exercise Boosts Immunity and Reduces Respiratory Infections

The following study examined the effects of moderate exercise on the immune system and respiratory infections over 12 weeks (Klentrou P, et.al., 2002).

Nine individuals participated in moderate exercise training, while ten remained sedentary. Researchers measured fitness levels, salivary immunoglobulin A (IgA) concentrations, and symptoms of upper respiratory tract infections (URTI).

The exercise group showed significant fitness improvement and an increase in IgA levels, a key immune marker.

They also reported fewer days with influenza symptoms and overall light URTI symptoms in the final weeks. The study found that regular, moderate exercise boosts IgA levels, potentially reducing the risk of infections.

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Reference: https://pubmed.ncbi.nlm.nih.gov/12070626/
Klentrou P, Cieslak T, MacNeil M, Vintinner A, Plyley M. Effect of moderate exercise on salivary immunoglobulin A and infection risk in humans. Eur J Appl Physiol. 2002 Jun;87(2):153-8.