Robust fatigue markers obtained from muscle synergy analysis.

IF 1.7 4区 医学 Q4 NEUROSCIENCES Experimental Brain Research Pub Date : 2024-10-01 Epub Date: 2024-08-13 DOI:10.1007/s00221-024-06909-5
Chen Zhang, Zi-Jian Zhou, Lu-Yi Wang, Ling-Hua Ran, Hui-Min Hu, Xin Zhang, Hong-Qi Xu, Ji-Peng Shi
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Abstract

This study aimed to utilize the nonnegative matrix factorization (NNMF) algorithm for muscle synergy analysis, extracting synergy structures and muscle weightings and mining biomarkers reflecting changes in muscle fatigue from these synergy structures. A leg press exercise to induce fatigue was performed by 11 participants. Surface electromyography (sEMG) data from seven muscles, electrocardiography (ECG) data, Borg CR-10 scale scores, and the z-axis acceleration of the weight block were simultaneously collected. Three indices were derived from the synergy structures: activation phase difference, coactivation area, and coactivation time. The indicators were further validated for single-leg landing. Differences in heart rate (HR) and heart rate variability (HRV) were observed across different fatigue levels, with varying degrees of disparity. The median frequency (MDF) exhibited a consistent decline in the primary working muscle groups. Significant differences were noted in activation phase difference, coactivation area, and coactivation time before and after fatigue onset. Moreover, a significant correlation was found between the activation phase difference and the coactivation area with fatigue intensity. The further application of single-leg landing demonstrated the effectiveness of the coactivation area. These indices can serve as biomarkers reflecting simultaneous alterations in the central nervous system and muscle activity post-exertion.

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从肌肉协同分析中获得可靠的疲劳标记。
本研究旨在利用非负矩阵因式分解(NNMF)算法进行肌肉协同作用分析,提取协同作用结构和肌肉权重,并从这些协同作用结构中挖掘反映肌肉疲劳变化的生物标志物。11 名参与者进行了压腿练习以诱发疲劳。同时收集了七块肌肉的表面肌电图(sEMG)数据、心电图(ECG)数据、博格CR-10量表评分以及重量块的z轴加速度。从协同结构中得出了三个指标:激活相位差、协同激活面积和协同激活时间。这些指标在单腿着地时得到了进一步验证。在不同的疲劳程度下,心率(HR)和心率变异性(HRV)存在不同程度的差异。中位频率(MDF)在主要工作肌群中呈现出一致的下降趋势。疲劳开始前后的激活相位差、共激活面积和共激活时间存在显著差异。此外,还发现激活相位差和共激活面积与疲劳强度之间存在明显的相关性。单腿着地的进一步应用证明了共激活面积的有效性。这些指数可作为生物标志物,同时反映运动后中枢神经系统和肌肉活动的变化。
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来源期刊
CiteScore
3.60
自引率
5.00%
发文量
228
审稿时长
1 months
期刊介绍: Founded in 1966, Experimental Brain Research publishes original contributions on many aspects of experimental research of the central and peripheral nervous system. The focus is on molecular, physiology, behavior, neurochemistry, developmental, cellular and molecular neurobiology, and experimental pathology relevant to general problems of cerebral function. The journal publishes original papers, reviews, and mini-reviews.
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