周边氧和和反复冲刺表现的个人间的变化在缺氧:一项对训练有素的受试者的观察研究
Naoya Takei1,2, Ryuji Muraki3, Olivier Girard4
1Research Institute of Physical Fitness, Japan Women's College of Physical Education, Tokyo, Japan.
Frontiers in sports and active living
|August 23, 2024
概括
周边氧和 (SpO2) 的个体变化在缺氧中重复冲刺时显著影响运动表现. 具有较低SpO2的运动员经历了更大的性能下降,突出了对低氧条件的个体反应的重要性.
科学领域:
- 运动科学 运动科学 运动科学
- 运动生理学 运动生理学
- 缺氧研究 缺氧研究
背景情况:
- 在低氧运动期间,外围氧和度 (SpO2) 的个体变异性尚不清楚.
- 固定的低氧刺激 (吸入氧气分数:FiO2) 不会引起统一的生理反应.
- 了解这些变化对于优化高海拔环境中的训练和表现至关重要.
研究的目的:
- 为了研究在低氧的反复冲刺运动中SPO2的个体差异.
- 为了确定这些SPO2变化的影响运动表现和疲劳的发展.
- 探索高训练的运动员中SpO2水平和冲刺减速之间的关系.
主要方法:
- 十三名训练有素的短跑选手完成了10x10秒的循环冲刺,在正常性缺氧 (FiO2:0.150) 中被动恢复了30秒.
- 在每次冲刺后,测量了周围氧和度 (SpO2),平均功率输出 (MPO) 和心率.
- 参与者被分为高 (HiSat) 和低 (LowSat) 和组,基于冲刺后的平均SpO2.
主要成果:
- 在HiSat (89.1% ± 1.5%) 和LowSat (84.7% ± 1.6%) 组 (P < 0.001) 之间观察到平均后冲刺 SpO2 的显著差异.
- 与HiSat组 (-17.9% ± 2.5%) (P = 0.008) 相比,LowSat组在冲刺减速得分 (Sdec; -22.3% ± 2.3%) 中呈现出明显较大的下降.
- 在SpO2和Sdec之间发现了显著的正相关性 (r=0.61,P=0.028),表明较低的SpO2与更大的性能下降有关.
结论:
- 在缺氧中重复冲刺期间,个体的SpO2反应在训练有素的运动员中差异很大.
- 冲刺后较低的SpO2水平与更大的疲劳发展和减少重复冲刺能力有关.
- 这些发现强调了考虑个人对缺氧的生理反应对于性能优化的重要性.
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