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Related Experiment Videos

Cardiac dimensions in athletes in relation to variations in their training program.

L H Snoeckx, H F Abeling, J A Lambregts

    European Journal of Applied Physiology and Occupational Physiology
    |January 1, 1983
    PubMed
    Summary

    Male endurance athletes exhibit greater cardiac dimensions and left ventricular hypertrophy (LVH) compared to controls. Cardiac adaptations to training load changes occur slowly, with performance peaking during competitive seasons.

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    Area of Science:

    • Sports Medicine
    • Cardiology
    • Physiology

    Background:

    • Endurance athletes often display cardiac adaptations.
    • The impact of training seasonality on these adaptations requires further investigation.

    Purpose of the Study:

    • To compare cardiac dimensions and left ventricular hypertrophy (LVH) in male long-distance runners (LDR) and cycle racers (CR) across different training seasons.
    • To assess maximal aerobic performance in relation to training phases.

    Main Methods:

    • Echocardiography was used to measure cardiac dimensions in athletes and control subjects (CS) across four training seasons.
    • Electrocardiography assessed left ventricular hypertrophy (LVH).
    • Maximal aerobic performance was determined using a bicycle ergometer.

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    Main Results:

    • Athletes consistently showed significantly greater left ventricular mass, interventricular septum thickness, left ventricular posterior wall thickness, and left ventricular internal diameter than CS.
    • Electrocardiographic findings confirmed LVH in athletes.
    • No significant cardiac dimension differences were found between the four training seasons, despite training variations.
    • Maximal aerobic performance varied by season, with higher workloads in competitive phases for LDR and lower values during rest for CR.

    Conclusions:

    • Athletes exhibit persistent cardiac adaptations (LVH) regardless of training season.
    • Cardiac dimension adaptation to training load variations is a slow process.
    • Performance metrics fluctuate seasonally, indicating a lag in cardiac response to training intensity changes.