在固定水平的感知力度上骑自行车引起的神经肌肉疲劳:不同所谓的低毒方法的影响
Jean-Baptiste Beaume1, Hervé Di Domenico1, Maximilien Bowen1
1Inter-University Laboratory of Human Movement Sciences, University Savoie Mont-Blanc, Chambéry, France.
Scandinavian journal of medicine & science in sports
|February 5, 2025
概括
循环限制血流 (BFR) 导致神经肌肉疲劳比系统性缺氧或气流限制口罩更大,突出了四头肌疼痛对表现的影响.
科学领域:
- 运动生理学 运动生理学
- 神经肌肉功能 神经肌肉功能
- 运动科学 运动科学 运动科学
背景情况:
- 了解神经肌肉疲劳对于优化运动表现和训练至关重要.
- 探索各种诱导缺氧的方法来模拟高海拔训练效应.
- 重要的是要比较不同缺氧模式的疗效和生理影响.
研究的目的:
- 为了比较正常氧气下骑自行车引起的神经肌肉疲劳与三个缺氧条件:系统性缺氧 (SyH),血液流量限制 (BFR) 和空气流量限制面具 (ARM).
- 为了评估这些条件对输出功率,中央和外围疲劳以及四头骨氧化的影响.
- 确定ARM在诱导缺氧方面的有效性和BFR的心理生理学影响.
主要方法:
- 17名健康参与者在正常 (NOR),SyH (FiO2=0.13),BFR (50%封闭压力) 和ARM (~3500m) 条件下以固定感知力度 (Borg 15/20) 进行了20分钟的自行车比赛.
- 评估神经肌肉功能 (最大自愿收缩,自愿激活) 和周围疲劳.
- 在整个过程中监测了功率输出,氧和 (SpO2),四头肌氧化 (TSI) 和疼痛.
主要成果:
- 与NOR和ARM相比,BFR和SyH的输出功率较低. SpO2仅在SyH下降.
- 与其他疾病相比,神经肌肉疲劳 (IMVC减少) 在BFR (-40%) 中显著增加,伴随着较低的自愿激活和增加四头肌疼痛.
- ARM没有诱导缺氧,而SyH显示较大的肌肉脱氧. 在没有更大的肌肉脱氧的情况下,BFR诱导了显著的疲劳,这表明疼痛的作用.
结论:
- 血液流量限制循环比系统性缺氧或空气流量限制面具引起更大的神经肌肉疲劳和中心激活缺陷.
- 空气流量限制面具在骑自行车时诱导缺氧是无效的.
- 四头骨疼痛显著导致最大和次最大运动输出减少,特别是在血液流量受限的情况下.
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