Performance, Metabolic, and Neuromuscular Consequences of Repeated Wingates in Hypoxia and Normoxia: A Pilot Study
| Autor: | Jacky Soo, Hideo Hatta, Naoya Takei, Olivier Girard |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
0301 basic medicine medicine.medical_specialty Pilot Projects Physical Therapy Sports Therapy and Rehabilitation 03 medical and health sciences Oxygen Consumption 0302 clinical medicine Internal medicine Fraction of inspired oxygen Heart rate medicine Blood lactate Humans Orthopedics and Sports Medicine Hypoxia Knee extensors business.industry 030229 sport sciences Oxygenation Hypoxia (medical) Muscle oxygenation 030104 developmental biology Neuromuscular fatigue Muscle Fatigue Lactates Cardiology Female medicine.symptom business |
| Zdroj: | International Journal of Sports Physiology and Performance. 16:1208-1212 |
| ISSN: | 1555-0273 1555-0265 |
| DOI: | 10.1123/ijspp.2020-0654 |
| Popis: | Background: Compared with normoxia, repeated short (5–10 s) sprints (>10 efforts) with incomplete recovery (≤30 s) in hypoxia likely cause substantial performance reduction accompanied by larger metabolic disturbances and magnitude of neuromuscular fatigue. However, the effects of hypoxia on performance of repeated long (30 s) “all-out” efforts with near complete recovery (4.5 min) and resulting metabolic and neuromuscular adjustments remain unclear. Purpose: The intention was to compare acute performance, metabolic, and neuromuscular responses across repeated Wingates between hypoxia and normoxia. Methods: On separate visits, 6 male participants performed 4 × 30-second Wingate efforts with 4.5-minute recovery in either hypoxia (fraction of inspired oxygen: 0.145) or normoxia. Responses to exercise (muscle and arterial oxygenation trends, heart rate, and blood lactate concentration) and the integrity of neuromuscular function in the knee extensors were assessed for each exercise bout. Results: Mean (P = .80) and peak (P = .92) power outputs, muscle oxygenation (P = .88), blood lactate concentration (P = .72), and perceptual responses (all Ps > .05) were not different between conditions. Arterial oxygen saturation was significantly lower, and heart rate higher, in hypoxia versus normoxia (P Ps Ps > .05). Conclusion: Despite heightened arterial hypoxemia and cardiovascular solicitation, hypoxic exposure during 4 repeated 30-second Wingate efforts had no effect on performance and accompanying metabolic and neuromuscular adjustments. |
| Databáze: | OpenAIRE |
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