肌肉线粒体容量在最大限度的运动后立即受损
Callie G Dickinson1, Kristin M Mendez, Makayla D Holyfield
1Department of Kinesiology, University of Georgia, Athens, GA.
Medicine and science in sports and exercise
|August 20, 2024
概括
在健康个体中,最大限度的运动暂时会损害肌肉的氧气吸收 (mV ̇O 2 max),在六分钟内完全恢复. 非侵入性近红外光谱学 (NIRS) 能够有效地追踪肌肉代谢中的这些快速变化.
科学领域:
- 运动生理学 运动生理学
- 肌肉的新陈代谢
- 生物医学工程 生物医学工程
背景情况:
- 了解运动后肌肉氧气吸收 (mV·O 2最大) 的时间过程对于评估肌肉恢复和代谢功能至关重要.
- 测量mV·O2max的先前方法在跟踪快速,短暂的变化方面存在局限性.
- 近红外光谱 (NIRS) 提供了一种非侵入性的方法,可以实时监测肌肉氧化和新陈代谢.
研究的目的:
- 为了测量肌肉氧气吸收的时间过程 (mV·O 2最大) 在健康参与者的最大和次最大运动后.
- 为了评估NIRS在追踪mV·O 2最大的暂时变化的有效性.
- 为了研究强度运动后mV·O2max的恢复动力学.
主要方法:
- 参与者 (n=12最大,n=8亚最大) 进行了1分钟的最大或亚最大脚部曲运动.
- 一个NIRS设备被用来测量mV̇O 2max在中间胃角肌.
- 使用不完整的恢复曲线,在运动前和运动后的多个时间点 (50,156,260,366秒) 评估mV̇O 2 max.
主要成果:
- 最大运动导致mV·O2max显著降低 (在第一次试验后降低了52%,P<0.001).
- 到第四次试验 (366秒后),mV̇O 2 max显著恢复,恢复到运动前的水平 (P = 0.41).
- 亚最大运动没有导致mV·O2最大或肌肉加速 (P>0.05) 的显著变化.
结论:
- 在年轻,健康的个体中,一分钟的最大运动暂时会损害mV·O2max.
- 在最大运动后大约6分钟内,mV·O2max的完全恢复得到.
- NIRS是一种有希望的,非侵入性的工具,用于监测运动恢复期间mV·O2max变化的时间进程.
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