No Influence of Acute Moderate Normobaric Hypoxia on Performance and Blood Lactate Concentration Responses to Repeated Wingates
No Influence of Acute Moderate Normobaric Hypoxia on Performance and Blood Lactate Concentration Responses to Repeated Wingates
复制标题
急性中度常压缺氧对重复温盖特的表现和血乳酸浓度反应没有影响
DOI：
10.1123/ijspp.2019-0933
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发表时间：
2021
影响因子：
3.3
通讯作者：
Hatta Hideo
中科院分区：
文献类型：
--
作者：
Takei Naoya;Kakinoki Katsuyuki;Girard Olivier;Hatta Hideo
背景：与常氧训练相比，低氧训练通常会引起更大的生理适应，但这并不总是转化为额外的表现优势。一种可能的解释是氧通量减少，对训练强度和/或训练量产生负面影响（减少训练刺激）。常氧条件下的重复温盖特 (RW) 是一种提高生理参数和运动能力的有效训练策略。然而，目前尚不清楚缺氧的增加是否会对 RW 表现产生不利影响。目的：检验急性中度缺氧对 RW 没有不利影响，而代谢和知觉反应会稍高的假设。方法：在不同的日子里，7 名男性大学短跑运动员在任一缺氧条件下进行 3 × 30 秒的 Wingate 努力，并进行 4.5 分钟的被动恢复（FiO2： 0.145）或含氧量正常（FiO2：0.209）。在第一次温盖特努力之前评估动脉氧饱和度，并在每次比赛后测量血乳酸浓度和感知用力等级。结果：平均（P= .92）和峰值（P= .63）功率输出、总做功（P= .98）和百分比衰减分数（P= .25）在不同条件下相似。与常氧相比，缺氧时的动脉氧饱和度显着降低（92.0% [2.8%] vs 98.1% [0.4%]，P< .01），而血乳酸浓度 (P= .78) 和感知用力等级 (P= .51) 在不同条件下没有差异。结论：在短跑运动员中，急性暴露于中度缺氧对 RW 表现和相关的代谢和知觉反应。
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.