Key result
Swimmers demonstrate better blood oxygen saturation during normobaric hypoxia testing compared to skiers.
Why the study?
The physiological responses of swimmers and skiers to increasing normobaric hypoxia and physical load were not well characterized comparatively.
How do gas exchange and cardiorespiratory responses to increasing normobaric hypoxia and physical load compare between swimmers and skiers?
Cross-Sectional
How do gas exchange and cardiorespiratory responses to increasing normobaric hypoxia and physical load compare between swimmers and skiers?
Swimmers demonstrate preadaptation to hypoxia allowing better blood oxygen saturation compared to skiers, highlighting physiological differences based on training modality.
Sport-specific hypoxic responses may inform athlete training; hypothesis-generating and should not yet change practice.
Qualification-comparable groups of young men engaged in cyclic kinds of sports were tested using a stepwise increasing load on a bicycle ergometer and 25-min exponentially increasing normobaric hypoxia to a final oxygen concentration of 10%. Skiers, who had the greatest values of maximal oxygen consumption during muscular work, showed relaxed cardiorespiratory reactions and a greater decrease in hemoglobin saturation with oxygen in hypoxia. Swimmers, whose ventilatory function in the course of trainings was restricted, developed preadaptation to hypoxia, with changes in external respiration and gas exchange functions, which allowed better saturation of blood with oxygen in lungs during hypoxia. The joint assessment of the aerobic capacity during physical work and physiological responses to hypoxia showed a direct correlation between the individual maximal oxygen consumption and the rate of decrease in the blood hemoglobin saturation in increasing hypoxia, which may be promising for assessing the functional state of athletes and its correction during training.
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Krivoschekov et al. (2013) conducted a cross-sectional in Healthy athletes. Swimming training (swimmers) vs. Skiing training (skiers) was evaluated on Gas exchange and cardiorespiratory system responses (blood hemoglobin saturation with oxygen). Swimmers demonstrated preadaptation to hypoxia with better blood oxygen saturation during a 25-minute normobaric hypoxia test compared to skiers.
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