在适度低氧状态下进行的自动节奏耐力运动中,没有性别差异的表现和感知疲劳
Julio S Hasegawa1, Andre C Silveira1, Rafael A Azevedo2
1Endurance Performance Research Group (GEDAE-USP), School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.
概括
中度缺氧同样会在骑自行车计时赛期间损害女性和男性的耐力表现和感知疲劳. 这些发现表明可比的功率输出调节来管理代谢干扰和疲劳.
科学领域:
- 运动生理学 运动生理学
- 环境生理学环境生理学
- 运动科学 运动科学 运动科学
背景情况:
- 了解在低氧条件下对运动的生理反应的基于性别的差异对于优化训练和表现至关重要.
- 以前的研究已经产生了关于运动表现和缺氧下疲劳性方面的性别差异的混合结果.
- 中度缺氧对感知和表现疲劳性的影响及其潜在的生理机制,需要对性别进行进一步的调查.
研究的目的:
- 为了研究在normoxia和中度缺氧下进行全身耐力运动时,表现和感知疲劳的潜在性别差异.
- 检查与性别和缺氧状况相关的性能疲劳的中心和外围决定因素.
- 为了比较性别和条件之间的感知劳动力 (RPE) 评级.
主要方法:
- 九名男子和八名女子骑自行车者在正常和中度低氧条件下完成了4公里的自行车计时赛.
- 性能疲劳性是通过对膝盖延伸器最大自愿同度收缩 (IMVC),自愿激活 (VA) 和潜在抽力 (TwPt) 的变化进行评估的.
- 感知疲劳度是用感知劳动力 (RPE) 的评级来衡量的.
主要成果:
- 与女性和男性 (P = 0.039) 的normoxia相比,缺氧完成试验的时间更长.
- 在IMVC,TwPt或VA的减少中没有观察到显著的性别或条件影响,这表明中心和外围疲劳的发展类似.
- 缺氧时的RPE显著高于两性正常时 (P = 0.002).
结论:
- 中度缺氧同样会影响女性和男性在4公里骑自行车计时赛期间的耐力表现和感知疲劳.
- 女性和男性似乎在中度缺氧下类似地调节功率输出,以避免恶化代谢障碍并实现可比的疲劳性.
- 研究结果表明,在中度缺氧的情况下,性别在这种特定的炼方案中不会显著影响中心或外周疲劳的发展.
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