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Bladder trauma in the long-distance runner.

N J Blacklock

    The American Journal of Sports Medicine
    |July 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Long-distance runners may experience occasional hematuria (blood in urine) due to bladder contusions from exertional forces. Bladder wall impacts, especially when the bladder is nearly empty, cause this temporary condition.

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    Area of Science:

    • Sports Medicine
    • Urology
    • Exercise Physiology

    Background:

    • Hematuria is a known, albeit infrequent, occurrence in some long-distance runners.
    • The exact cause of exercise-induced hematuria in runners remains a subject of investigation.

    Purpose of the Study:

    • To investigate the biomechanical factors contributing to hematuria in long-distance runners.
    • To explain the intermittent nature of hematuria experienced by athletes.

    Main Methods:

    • The study proposes a biomechanical model explaining bladder contusions during running.
    • It analyzes the role of exertional forces and intraabdominal pressure.
    • Considers the impact of bladder filling status on the occurrence of hematuria.

    Main Results:

    Related Experiment Videos

    • Hematuria is attributed to bladder contusions resulting from repeated impacts.
    • These impacts occur between the flaccid bladder wall and the bladder base.
    • The condition is exacerbated by high exertional forces and intraabdominal pressure.
    • An empty or near-empty bladder increases the risk of surface apposition and impact.

    Conclusions:

    • The primary cause of occasional hematuria in long-distance runners is bladder contusion.
    • The inconsistency of hematuria is linked to the variable state of bladder filling during exercise.
    • Understanding these factors can help manage and potentially prevent exercise-induced hematuria.