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[Quantitative studies on reversible thrombocyte aggregation during exertion].

P Haber, K Silberbauer, H Sinzinger

    Schweizerische Medizinische Wochenschrift
    |October 11, 1980
    PubMed
    Summary
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    Intense exercise, especially in the anaerobic range, significantly increases platelet aggregation, raising concerns for athletes over 30. Pre-exercise screening and gradual aerobic training are recommended to mitigate risks associated with exercise-induced metabolic acidosis and platelet changes.

    Area of Science:

    • Sports Medicine
    • Exercise Physiology
    • Hematology

    Context:

    • Exercise stress tests reveal physiological responses to physical exertion.
    • Platelet aggregation is a key factor in thrombotic events.
    • Metabolic acidosis occurs during intense anaerobic exercise.

    Purpose:

    • To investigate the relationship between exercise intensity, metabolic acidosis, and platelet aggregation in oarsmen.
    • To assess changes in platelet count ratio (a marker of aggregation tendency) during a maximal stress test.
    • To correlate these changes with blood gas parameters like base excess.

    Summary:

    • A symptom-limited bicycle stress test was performed on 8 oarsmen (aged 19-31).
    • Platelet count ratio significantly decreased at exhaustion, indicating increased platelet aggregation.

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  • A strong correlation was found between base excess and platelet count ratio, with aggregation increasing in the anaerobic, acidosis-inducing range.

    • Impact:

    • Findings suggest that increased platelet aggregation during intense exercise is linked to metabolic acidosis, not aerobic metabolism.
    • This has implications for understanding sudden cardiac events in sports, particularly in older individuals or those unconditioned.
    • Recommendations include pre-participation screening and gradual aerobic training for individuals over 30 starting competitive or intensive exercise.