EMG analysis of human inspiratory muscle resistance to fatigue during exercise.
EMG analysis of human inspiratory muscle resistance to fatigue during exercise.
复制标题
运动时人体吸气肌抗疲劳能力的肌电图分析。
DOI：
10.1007/978-94-007-6627-3_29
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发表时间：
2013
影响因子：
--
通讯作者：
N. P. Aleksandrova
中科院分区：
文献类型：
--
作者：
M. Segizbaeva;Z. Donina;N. Timofeev;Yu.N. Korolyov;V. N. Golubev;N. P. Aleksandrova
本研究的目的是表征吸气肌疲劳的模式，并评估膈肌 (D)、胸骨旁 (PS)、胸锁乳突肌 (SCM) 和斜角肌 (SC) 的抗疲劳能力。九名健康、未经训练的男性受试者参与了这项研究。在增量循环测试至力竭期间记录 D、PS、SCM 和 SC 的肌电活动 (EMG)（工作负荷为 1.0 W/kg，每 5 分钟增量为 0.5 W/kg）。进行运动前后最大吸气压力（MIP）和肌电图功率谱变化的测量。与对照条件相比，运动后最大吸气压力下降约 8.1%（124.3 ± 8.5 vs. 114.2 ± 8.9 cmH2O）（P > 0.05），而所有受试者在运动后 Müller 动作期间 D、PS、SCM 和 SC 的综合电活动峰值均显着高于运动前。通过分析肌电图功率谱的质心频率（fc）的变化来评估吸气肌疲劳的程度。三名受试者出现运动引起的 D 疲劳，另外两名受试者出现 PS 疲劳；而在 4 名受试者中观察到 D 疲劳和 PC 疲劳。所有受试者的 SCM 和 SC 的 fc 均显着降低。结果表明，在运动至力竭期间，可能会在 D、PS、SCM 和 SC 肌肉中检测到疲劳过程的早期迹象。在力竭运动过程中，D 肌或 PS 肌的疲劳会选择性地或同时出现，具体取决于呼吸肌的募集模式。与 D 肌和 PS 肌相比，颈部辅助吸气肌的抗疲劳能力较差。
The aim of this study was to characterize the pattern of inspiratory muscle fatigue and to assess the resistance to fatigue of the diaphragm (D), parasternal (PS), sternocleidomastoid (SCM), and scalene (SC) muscles. Nine healthy, untrained male subjects participated in this study. Electromyographic activity (EMG) of D, PS, SCM, and SC was recorded during an incremental cycling test to exhaustion (workload of 1.0 W/kg with 0.5 W/kg increments every 5 min). The before-to-after exercise measurements of maximal inspiratory pressure (MIP) and EMG power spectrum changes were performed. The maximal inspiratory pressure declined about 8.1 % after exercise compared with that in the control condition (124.3 ± 8.5 vs. 114.2 ± 8.9 cmH2O) (P > 0.05), whereas the peak magnitude of integrated electrical activity of D, PS, SCM, and SC during the post-exercise Müller maneuver was significantly greater in all subjects than that pre-exercise. The extent of inspiratory muscles fatigue was evaluated by analysis of a shift in centroid frequency (fc) of EMG power spectrum. Exercise-induced D fatigue was present in three subjects and PS fatigue was another in two; whereas both D and PC fatigue were observed in four subjects. All subjects demonstrated a significant reduction in fc of SCM and SC. Results indicate that early signs of the fatiguing process might be detected in the D, PS, SCM, and SC muscles during exercise to exhaustion. Fatigue of either D or PS muscles develops selectively or together during exhaustive exercise, depending on the recruitment pattern of respiratory muscles. Accessory inspiratory muscles of the neck are less resistant to fatigue compared with the D and PS muscles.
膈肌和肋骨肌肉疲劳之间的分离。
DOI：
10.1152/jappl.1988.64.3.959
发表时间：
1988
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Fitting,JW;Bradley,TD;Easton,PA;Lincoln,MJ;Goldman,MD;Grassino,A
通讯作者：
Grassino,A