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Related Experiment Videos

Leg length discrepancy in marathon runners.

R H Gross

    The American Journal of Sports Medicine
    |May 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Leg length discrepancies are common in male marathon runners. Differences up to 25 mm may not hinder performance, and shoe lifts showed no consistent benefits.

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    Area of Science:

    • Sports Medicine
    • Biomechanics
    • Running Performance

    Background:

    • Leg length discrepancy (LLD) is a common condition.
    • Its impact on athletic performance, particularly in endurance sports like marathon running, requires further investigation.

    Purpose of the Study:

    • To investigate the incidence and degree of LLD in male marathon runners.
    • To assess whether LLD affects marathon running performance.
    • To evaluate the efficacy of shoe lifts in managing LLD for runners.

    Main Methods:

    • A cohort of 35 male marathon runners was assessed for LLD.
    • LLD was categorized into specific millimeter ranges.
    • Data on shoe lift usage was collected and analyzed in relation to LLD severity.

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    Main Results:

    • A significant proportion of runners exhibited LLD, with 77% in their 30s or 40s.
    • 18 runners had LLD < 5 mm, 10 had LLD between 5-9 mm, and 7 had LLD ≥ 1.0 cm.
    • Among runners using lifts, most had LLD < 5 mm.

    Conclusions:

    • LLD ranging from 5 mm to 25 mm may not be a functional impediment for marathon runners.
    • No consistent performance benefits were observed with the use of shoe lifts in this cohort.