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Improved work capacity at altitude by transfusional polycythemia.

E Rewald1

  • 1Fundación Hematológica, Mar del Plata, Argentina.

The Journal of Sports Medicine and Physical Fitness
|August 7, 2013
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Boosting blood oxygen capacity through transfusion in tennis players improved their performance at high altitudes. This enhanced oxygen-carrying ability was well-tolerated, leading to better subjective work capacity, reduced dyspnea, and lower pulse rates in simulated high-altitude conditions.

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Area of Science:

  • Sports Science
  • Altitude Physiology
  • Hematology

Background:

  • Athletes often face performance challenges at high altitudes due to reduced oxygen availability.
  • Blood oxygen-carrying capacity is a critical factor for endurance and performance.
  • Artificial enhancement of blood oxygen capacity is a potential strategy to mitigate altitude effects.

Purpose of the Study:

  • To investigate the effects of artificially increased blood oxygen capacity on tennis players' performance at high altitude.
  • To assess the tolerance and physiological responses to induced polycythemia in an athletic cohort.
  • To evaluate the impact of enhanced oxygen transport on subjective and objective measures of exercise capacity.

Main Methods:

  • Six tennis players from sea level (Mar del Plata) were studied.
  • Three players underwent blood transfusion to increase hemoglobin (Hb) levels to approximately 19.83 g/dL, inducing polycythemia.
  • Players were then transported to high altitude (La Paz, 3,600m) and their performance, including subjective work capacity, dyspnea, and pulse rate, was assessed.

Main Results:

  • The transfusion group exhibited significantly higher hemoglobin levels, creating a state of overcompensative polycythemia compared to controls and local residents.
  • This induced polycythemia was well-tolerated by the athletes.
  • A striking improvement in subjective work capacity was observed.
  • Objective measures, including reduced dyspnea and lower pulse rate, indicated enhanced exercise tolerance.

Conclusions:

  • Artificially increasing blood oxygen capacity via transfusion can effectively improve exercise tolerance and perceived work capacity in athletes at high altitudes.
  • Induced polycythemia, when achieved through transfusion, appears to be a safe and well-tolerated intervention for enhancing athletic performance under hypoxic conditions.
  • These findings suggest that optimizing oxygen transport is a viable strategy for athletes competing or training at high altitudes.