What question did this study set out to answer?

To examine opposing scientific arguments on whether strenuous exercise directly impairs immune function to increase infection risk, or whether external confounding factors explain illness susceptibility.

July 15, 2026Open Access

Can exercise affect immune function to increase susceptibility to infection?

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To examine opposing scientific arguments on whether strenuous exercise directly impairs immune function to increase infection risk, or whether external confounding factors explain illness susceptibility.
Convened leading exercise immunology experts to debate whether arduous physical activity independently suppresses host immune defense.
Evaluated empirical evidence across four primary themes: athlete infection incidence, exercise causality versus confounding lifestyle stressors, biomarker reliability, and evidentiary quality.
Both debating panels agreed that elevated infection susceptibility in elite athletes has a multifactorial basis involving sleep loss, travel, psychological stress, and nutritional deficits.
Evidence remains contested and unresolved as to whether arduous exercise independently acts as a causative agent of clinical immunosuppression and elevated infection rates.

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Implication

Debate review reveals contested evidence regarding exercise-induced immunosuppression in endurance athletes, highlighting multifactorial causes behind elevated infection risk.

Cite This Study

Simpson et al. (2026) studied this question.

synapsesocial.com/papers/6a795321756812e39588fbaf https://doi.org/10.22029/eir.2020.1730

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Implication

Debate review reveals contested evidence regarding exercise-induced immunosuppression in endurance athletes, highlighting multifactorial causes behind elevated infection risk.

Can exercise affect immune function to increase susceptibility to infection?

Key Points

Discussion

Implication

Cite This Study

Can exercise affect immune function to increase susceptibility to infection?

Key Points

Discussion

Implication

Cite This Study

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