在严重强度运动期间,任务失败的时间与肌肉,血液和呼吸系统的变化有关吗?
Alessandro M Zagatto1, Rodrigo A B de Poli1, Elvis S Malta1
1São Paulo State University (UNESP), Bauru, Sao Paulo, Brazil.
Physiological genomics
|January 15, 2025
概括
在严重强度循环运动中,任务失败的时间与肌肉缓冲,氧化途径和肉蛋白变化有关. 这些因素,加上厌氧能力,解释了运动限制,而不是糖原或pH水平.
科学领域:
- 运动生理学 运动生理学
- 代谢科学 代谢科学
- 运动科学 运动科学 运动科学
背景情况:
- 了解运动限制的生理和代谢决定因素对于优化训练和表现至关重要.
- 运动的严重强度领域对保持表现提出了独特的挑战,任务失败的时间 (TTF) 是耐力能力的关键指标.
研究的目的:
- 调查在严重强度领域内的恒定工作速率 (CWR) 循环运动中与任务失败时间 (TTF) 相关的生理和代谢参数.
- 确定导致高强度运动中疲劳的主要限制因素.
主要方法:
- 45名身体活跃的男性在115%的峰值功率输出时进行了CWR自行车测试.
- 实验1评估了神经肌肉功能 (外围和中心疲劳指数).
- 实验2测量了生理 (呼吸,能量贡献) 和代谢参数 (血气计,乳酸,巨大的横向肌肉代谢量,糖原,pH,缓冲能力).
主要成果:
- TTF与氧化贡献 (r=0.811),肌肉缓冲能力 (r=0.792),卡尼丁变化 (r=0.855),无氧能力 (r=0.554) 和素能量贡献 (r=0.583) 有显著的相关性.
- 在TTF和电肌图,血液酸平衡,肌肉糖原含量或肌肉pH之间没有发现显著的相关性.
- 代谢分析突出显示了肌肉缓冲能力,氧化途径和肉氨酸变化是TTF的关键贡献者.
结论:
- 在严重强度的CWR循环过程中,任务失败的时间是多因素的,主要受到肌肉缓冲能力,氧化能量供应和素系统贡献的影响.
- 肌肉缓冲能力,氧化途径和卡尼丁代谢被确定为限制严重强度领域运动表现的关键外围因素.
- 诸如肌肉糖原含量,pH值和电肌图学反应等因素似乎不是在这个运动强度领域中TTF的主要决定因素.
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