Suppr超能文献

股四头肌持续最大自主收缩后中枢和外周疲劳可靠性的评估。

Assessment of the reliability of central and peripheral fatigue after sustained maximal voluntary contraction of the quadriceps muscle.

作者信息

Place Nicolas, Maffiuletti Nicola A, Martin Alain, Lepers Romuald

机构信息

INSERM ERM 207 Motricité Plasticité, Faculté des Sciences du Sport, Université de Bourgogne, BP 27877, 21078 Dijon, France.

出版信息

Muscle Nerve. 2007 Apr;35(4):486-95. doi: 10.1002/mus.20714.

Abstract

The aim of the present study was to further confirm the validity of measurements for characterizing neuromuscular alterations by establishing their reliability both before and after fatigue. Thirteen men (28 +/- 5 years) volunteered to participate in two separate identical sessions requiring the performance of a sustained maximal voluntary contraction (MVC) with the quadriceps muscle for 2 min. MVC and transcutaneous electrical stimulations were used before and immediately after the fatiguing contraction to investigate the reliability of MVC torque, central activation, and peripheral variables (M-wave properties, peak twitch, peak doublet) within and between sessions. Based on previous and present results, we advise the use of (1) voluntary activation level with potentiated doublet as a reference to describe central fatigue, (2) electromyographic activity of vastus lateralis muscle as a surrogate for quadriceps for both voluntary and evoked contraction, and (3) potentiated peak doublet amplitude to investigate contractile fatigue. These findings can be useful in the choice of the parameters describing central and peripheral fatigue of the quadriceps muscle in future studies.

摘要

本研究的目的是通过确定疲劳前后测量的可靠性,进一步证实用于表征神经肌肉改变的测量方法的有效性。13名男性(28±5岁)自愿参加两个单独的相同实验环节,要求股四头肌进行2分钟的持续最大自主收缩(MVC)。在疲劳收缩之前和之后立即使用MVC和经皮电刺激,以研究各实验环节内和各实验环节之间MVC扭矩、中枢激活和外周变量(M波特性、单收缩峰值、双脉冲峰值)的可靠性。基于之前和目前的结果,我们建议使用以下方法:(1)以增强双脉冲的自主激活水平作为描述中枢疲劳的参考;(2)将股外侧肌的肌电图活动作为股四头肌在自主收缩和诱发收缩时的替代指标;(3)使用增强的双脉冲峰值幅度来研究收缩性疲劳。这些发现有助于未来研究中选择描述股四头肌中枢和外周疲劳的参数。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验