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Related Experiment Videos

Haematological changes due to triathlon competition.

R J Davidson, J D Robertson, R J Maughan

    British Journal of Sports Medicine
    |December 1, 1986
    PubMed
    Summary

    This study tracked blood cell changes during a triathlon. Intense exercise, like cycling and running, significantly decreased plasma volume and increased white blood cell counts.

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    Area of Science:

    • Sports Medicine
    • Exercise Physiology
    • Hematology

    Background:

    • Triathlons involve prolonged, multi-disciplinary exercise.
    • Understanding physiological responses to endurance events is crucial for athletes and sports scientists.
    • Blood cell profiles can indicate physiological stress and adaptation.

    Purpose of the Study:

    • To investigate changes in a twelve-parameter blood cell profile during a triathlon.
    • To assess the impact of cycling, running, and canoeing phases on hematological parameters.
    • To determine the timing and magnitude of these physiological responses.

    Main Methods:

    • Six subjects participated in a triathlon comprising cycling, running, and canoeing.
    • A twelve-parameter blood cell count was measured pre- and post-each exercise phase.
    • Plasma volume changes and leukocyte count alterations were analyzed.

    Main Results:

    • A significant decrease in plasma volume (8.7%) was observed after cycling, persisting throughout the event.
    • Circulating leukocyte counts substantially increased after cycling (84%) and running (255%).
    • No further increase in leukocyte count was noted after canoeing, suggesting a maximal response post-running.

    Conclusions:

    • Triathlon exercise induces significant plasma volume reduction and leukocyte elevation.
    • The hematological response appears to be exercise-intensity and type-dependent.
    • Fluid shifts and individual variability may influence red blood cell parameter changes.

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