Hypoxia Does Not Change Performance and Psychophysiological Responses During Repeated Cycling Sprints to Exhaustion With Short Exercise-to-Rest Ratio
| Autor: | Antoine Raberin, Sarah J. Willis, Thomas Richard, Joakim Elmer, Gianluca Vernillo, F. Marcello Iaia, Olivier Girard, Davide Malatesta, Grégoire P. Millet |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | International Journal of Sports Physiology and Performance. 18:213-217 |
| ISSN: | 1555-0273 1555-0265 |
| Popis: | Purpose: To compare the acute performance and psychophysiological responses of repeated cycling sprints to exhaustion with a short exercise-to-rest ratio (1:6), between different effort durations and inspired oxygen fractions. Methods: On separate visits, 10 active participants completed 6 repeated cycling sprint exercises to exhaustion with 3 different effort durations (5, 10, and 20 s) and 2 conditions of inspired oxygen (20.9% and 13.6%). Exercise-to-rest ratio was 1:6 for all trials (ie, 5:30, 10:60, and 20:120). Vastus lateralis muscle oxygenation (near-infrared spectroscopy), blood lactate concentration, and lower-limb and breathing discomfort, using ratings of perceived exertion, were measured. Results: Number of sprints and peak power output decreased while blood lactate increased (all P P P = .002) during sprint with increasing sprint duration (no condition or interaction). Conclusion: During repeated-sprint exercise to exhaustion with a short exercise-to-rest ratio, the psychophysiological responses did not differ between normoxia and moderate hypoxia, probably due to an extended recovery period. It means that hypoxia did not modify repeated-sprint exercise performance with a short exercise-to-rest ratio. The sprint duration was the primary underlying factor of the observed differences in performance and muscle oxygenation reported between the repeated-sprint exercise sessions. |
| Databáze: | OpenAIRE |
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