由高压盐水注射引起的高肌肉疼痛减少了在固定感知力循环过程中独立于生理变化的功率输出
Callum A O'Malley1,2, Ryan Norbury1,3, Samuel A Smith1
1School of Sport and Exercise Sciences, University of Kent, Canterbury, United Kingdom.
Journal of applied physiology (Bethesda, Md. : 1985)
|May 30, 2024
概括
经历肌肉疼痛在固定感知力度运动期间显著降低功率输出. 这种疼痛会影响自我调节和大脑氧化,但不会影响长期的运动行为.
科学领域:
- 运动生理学 运动生理学
- 神经科学是一个神经科学.
- 疼痛研究 疼痛研究
背景情况:
- 疼痛自然会通过神经生理学和心理生理学变化来抑制运动表现.
- 以前的研究表明,疼痛会降低给定的感知力度的任务输出,但这还没有直接测试.
研究的目的:
- 为了研究肌肉疼痛增加对功率输出,心理生理反应,大脑氧化和固定感知力度运动期间感知变化的影响.
- 为了确定疼痛诱导的功率输出减少是否在疼痛刺激被移除后仍然存在.
主要方法:
- 十名参与者在气体交换值 (GET) 以上15%的固定感知力度循环,感知力度 (RPE) 评级为15.
- 肌肉疼痛是通过向横向巨注射高性盐水来诱导的,与同位素盐水对照进行比较.
- 测量包括输出功率,心肺呼吸变量,大脑氧化率 (脱氧血红蛋白) 和感知标记 (例如,情感价值).
主要成果:
- 与同位素条件相比,在高压 (疼痛) 条件下,输出功率明显较低.
- 在条件之间的心率或氧气吸收等生理变量中没有发现显著差异.
- 在大脑脱氧血红蛋白变化和情感价值方面观察到显著的条件影响,表明疼痛的心理生理影响.
结论:
- 高度肌肉疼痛,由高血压盐水诱导,在固定感知力的运动中显著降低功率输出.
- 疼痛似乎通过心理生理机制影响运动行为的自我调节,由大脑氧化和知觉的变化证明.
- 这项研究表明,疼痛会严重影响运动表现,但不会对运动行为产生残留影响.
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