Effect of prior neuromuscular electrical stimulation of vastus lateralis on the fatigue induced by a sustained voluntary knee extension in men

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology Pub Date : 2024-11-06 DOI:10.1016/j.jelekin.2024.102942

Clément Lanfranchi , Boris Matkowski , Sylvain Rayroud , Alain Martin , Nicola A Maffiuletti , Romuald Lepers , Nicolas Place

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Abstract

Purpose

The purpose of this study was to investigate the effect of vastus lateralis (VL) selective fatigue induced by neuromuscular electrical stimulation (NMES) on knee extensor electromyographic (EMG) activity during a sustained submaximal isometric contraction.

Methods

Thirteen healthy men (28 ± 5 years) completed two experimental sessions in which either the VL was pre-fatigued for 17 min (NMES session) or no intervention was performed (control session, CTRL). Subsequently, participants were asked to sustain an isometric knee extension at 20 % of maximal voluntary contraction (MVC) torque until task failure.

Results

VL M-wave amplitude was reduced (−34 ± 26 %, P = 0.008) following the NMES intervention, while MVC torque was reduced by 26 ± 10 %. The time to task failure was 23 ± 10 % shorter (P = 0.002) in NMES (186 ± 75 s) than in CTRL (251 ± 128 s). EMG activity measured during the sustained contraction was higher for vastus medialis and rectus femoris muscles in NMES compared to CTRL (P < 0.001), but was comparable for VL (P > 0.05). The extent and origin of neuromuscular fatigue at task failure measured through MVCs combined with electrically-evoked contractions did not differ between NMES and CTRL.

Conclusion

Compensatory activity from synergist muscles occurred in response to a pre-fatigue intervention, which reduced the time to task failure of a sustained submaximal contraction but did not affect the extent and origin of neuromuscular fatigue.

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事先对阔筋膜进行神经肌肉电刺激对男性持续自主伸膝引起疲劳的影响

目的：本研究旨在探讨神经肌肉电刺激（NMES）诱导的阔筋膜外侧肌（VL）选择性疲劳对持续亚最大等长收缩期间膝关节伸肌肌电图（EMG）活动的影响：13 名健康男性（28 ± 5 岁）完成了两个实验环节，在这两个环节中，要么预先疲劳 VL 17 分钟（NMES 环节），要么不进行干预（对照环节，CTRL）。随后，参与者被要求以最大自主收缩力矩（MVC）的 20% 保持等长伸膝，直至任务失败：结果：接受 NMES 干预后，VL M 波振幅降低（-34 ± 26 %，P = 0.008），而 MVC 扭矩降低了 26 ± 10 %。NMES 的任务失败时间（186 ± 75 秒）比 CTRL 的任务失败时间（251 ± 128 秒）短 23 ± 10 %（P = 0.002）。与 CTRL 相比，NMES 在持续收缩期间测量到的肌电图活动对阔内肌和股直肌的影响更大（P 0.05）。在任务失败时，通过 MVCs 结合电诱发收缩测量的神经肌肉疲劳程度和来源在 NMES 和 CTRL 之间没有差异：结论：协同肌的补偿活动是对疲劳前干预的反应，它缩短了持续亚最大收缩任务失败的时间，但并不影响神经肌肉疲劳的程度和起源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Electromyography and Kinesiology 医学-康复医学

CiteScore

4.70

自引率

8.00%

发文量

审稿时长

74 days

期刊介绍： Journal of Electromyography & Kinesiology is the primary source for outstanding original articles on the study of human movement from muscle contraction via its motor units and sensory system to integrated motion through mechanical and electrical detection techniques. As the official publication of the International Society of Electrophysiology and Kinesiology, the journal is dedicated to publishing the best work in all areas of electromyography and kinesiology, including: control of movement, muscle fatigue, muscle and nerve properties, joint biomechanics and electrical stimulation. Applications in rehabilitation, sports & exercise, motion analysis, ergonomics, alternative & complimentary medicine, measures of human performance and technical articles on electromyographic signal processing are welcome.