Journal article
Repeated-sprint training in heat and hypoxia: Effect of exercise-to-rest ratio
European Journal of Sport Science, pp.1-15
2022
Abstract
The aim of this study was to investigate acute performance and physiological responses to the manipulation of exercise-to-rest ratio (E:R) during repeated-sprint hypoxic training (RSH) in hot conditions. Twelve male team-sport players completed two experimental sessions at a simulated altitude of ∼3000 m (FIO2 0.144), air temperature of 40°C and relative humidity of 50%. Exercise involved either 3×5×10-s (E:R1:2) or 3×10×5-s (E:R1:4) maximal cycling sprints interspersed with active recoveries at 120W (20-s between sprints, 2.5 and 5-min between sets for E:R1:2 and E:R1:4 respectively). Sessions were matched for overall sprint and total session duration (47.5-min). Peak and mean power output, and total work were greater in E:R1:4 than E:R1:2 (p < 0.05). Peak core temperature was significantly higher in E:R1:4 than E:R1:2 (38.44 ± 0.33 vs. 38.20 ± 0.35°C, p = 0.028). Muscle deoxygenation magnitude during sprints was greater in E:R1:2 (28.2 ± 1.6 vs. 22.4 ± 4.6%, p < 0.001), while muscle reoxygenation did not differ between conditions (p > 0.05).These results indicate E:R1:4 increased mechanical power output and core temperature compared to E:R1:2. Both protocols had different effects on measures of muscle oxygenation, with E:R1:2 generating greater muscle oxygen extraction and E:R1:4 producing more muscle oxygenation flux, which are both important signals for peripheral adaptation. We conclude that the E:R manipulation during RSH in the heat might be used to target different physiological and performance outcomes, with these findings forming a strong base for future mechanistic investigation.
Details
- Title
- Repeated-sprint training in heat and hypoxia: Effect of exercise-to-rest ratio
- Authors/Creators
- M.C. Dennis (Author/Creator) - The University of Western AustraliaP.S.R. Goods (Author/Creator) - Murdoch UniversityM.J. Binnie (Author/Creator) - The University of Western AustraliaO. Girard (Author/Creator) - The University of Western AustraliaK.E. Wallman (Author/Creator) - The University of Western AustraliaB. Dawson (Author/Creator) - The University of Western AustraliaF. Billaut (Author/Creator) - Université LavalP. Peeling (Author/Creator) - The University of Western Australia
- Publication Details
- European Journal of Sport Science, pp.1-15
- Publisher
- Taylor & Francis
- Identifiers
- 991005541034107891
- Murdoch Affiliation
- Centre for Healthy Ageing; Murdoch Applied Sports Science Laboratory
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.172 Sports Science
- 1.172.648 Exercise Physiology
- Web Of Science research areas
- Sport Sciences
- ESI research areas
- Clinical Medicine