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Gastrointestinal bleeding in marathon runners.

F A Halvorsen, J Lyng, S Ritland

    Scandinavian Journal of Gastroenterology
    |May 1, 1986
    PubMed
    Summary
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    Marathon runners frequently experience gastrointestinal bleeding and disturbances. While not leading to anemia in this study, these findings highlight common issues in endurance athletes.

    Area of Science:

    • Sports Medicine
    • Gastroenterology
    • Exercise Physiology

    Background:

    • Runner's anemia is a condition linked to potential gastrointestinal bleeding.
    • Understanding the prevalence of gastrointestinal issues in marathon runners is crucial.

    Purpose of the Study:

    • To investigate the incidence of gastrointestinal bleeding in marathon runners.
    • To assess the occurrence of postrace hematuria and gastrointestinal disturbances.

    Main Methods:

    • Collected and analyzed prerace and postrace fecal samples for blood from 63 marathon runners.
    • Conducted clinical investigations to rule out gastrointestinal diseases.
    • Monitored for postrace hematuria and self-reported gastrointestinal disturbances.

    Main Results:

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    • 13% of runners tested positive for fecal blood postrace, with no identified gastrointestinal disease.
    • Another 13% exhibited postrace hematuria.
    • 54% reported running-related gastrointestinal disturbances, though no overt bleeding or anemia was observed.

    Conclusions:

    • Gastrointestinal complaints and bleeding are common in marathon runners.
    • These gastrointestinal issues may contribute to, but do not necessarily cause, runner's anemia.
    • Further research is needed to understand the implications of these findings.