scholarly journals The effect of severe and moderate hypoxia on exercise at a fixed level of perceived exertion

2019 ◽  
Vol 119 (5) ◽  
pp. 1213-1224 ◽  
Author(s):  
Owen Jeffries ◽  
Stephen David Patterson ◽  
Mark Waldron
Keyword(s):  
Perceived Exertion ◽  
Moderate Hypoxia ◽  
Fixed Level

No Influence of Acute Moderate Normobaric Hypoxia on Performance and Blood Lactate Concentration Responses to Repeated Wingates

2021 ◽  
Vol 16 (1) ◽  
pp. 154-157
Author(s):  
Naoya Takei ◽  
Katsuyuki Kakinoki ◽  
Olivier Girard ◽  
Hideo Hatta
Keyword(s):  
Oxygen Saturation ◽  
Blood Lactate ◽  
Perceived Exertion ◽  
Detrimental Effect ◽  
Arterial Oxygen Saturation ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Arterial Oxygen ◽  
Ratings Of Perceived Exertion ◽  
Moderate Hypoxia

Background: Training in hypoxia versus normoxia often induces larger physiological adaptations, while this does not always translate into additional performance benefits. A possible explanation is a reduced oxygen flux, negatively affecting training intensity and/or volume (decreasing training stimulus). Repeated Wingates (RW) in normoxia is an efficient training strategy for improving both physiological parameters and exercise capacity. However, it remains unclear whether the addition of hypoxia has a detrimental effect on RW performance. Purpose: To test the hypothesis that acute moderate hypoxia exposure has no detrimental effect on RW, while both metabolic and perceptual responses would be slightly higher. Methods: On separate days, 7 male university sprinters performed 3 × 30-s Wingate efforts with 4.5-min passive recovery in either hypoxia (FiO2: 0.145) or normoxia (FiO2: 0.209). Arterial oxygen saturation was assessed before the first Wingate effort, while blood lactate concentration and ratings of perceived exertion were measured after each bout. Results: Mean (P = .92) and peak (P = .63) power outputs, total work (P = .98), and the percentage decrement score (P = .25) were similar between conditions. Arterial oxygen saturation was significantly lower in hypoxia versus normoxia (92.0% [2.8%] vs 98.1% [0.4%], P < .01), whereas blood lactate concentration (P = .78) and ratings of perceived exertion (P = .51) did not differ between conditions. Conclusion: In sprinters, acute exposure to moderate hypoxia had no detrimental effect on RW performance and associated metabolic and perceptual responses.

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