Academic Journal
Repeated-sprint training in heat and hypoxia: Effect of exercise-to-rest ratio
| العنوان: | Repeated-sprint training in heat and hypoxia: Effect of exercise-to-rest ratio |
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| المؤلفون: | Dennis, M.C., Goods, P.S.R., Binnie, M.J., Girard, O., Wallman, K.E., Dawson, B., Billaut, F., Peeling, P. |
| بيانات النشر: | Taylor & Francis |
| سنة النشر: | 2022 |
| الوصف: | 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1746-1391 |
| Relation: | ispartof: European Journal of Sport Science spage 1 epage 15; WOS:000853381300001; https://doi.org/10.1080/17461391.2022.2085631; 991005541034107891; https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Repeated-sprint-training-in-heat-and-hypoxia/991005541034107891; alma:61MUN_INST/bibs/991005541034107891 |
| DOI: | 10.1080/17461391.2022.2085631 |
| الاتاحة: | https://doi.org/10.1080/17461391.2022.2085631 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Repeated-sprint-training-in-heat-and-hypoxia/991005541034107891 |
| رقم الانضمام: | edsbas.6991D1A9 |
| قاعدة البيانات: | BASE |
| تدمد: | 17461391 |
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| DOI: | 10.1080/17461391.2022.2085631 |