Force and Neuromuscular Responses During a Handgrip Hold to Failure Anchored to a Moderate Perceptual Intensity in Males.

IF 1.7 4区医学 Q4 NEUROSCIENCES

Journal of musculoskeletal & neuronal interactions Pub Date : 2024-06-01

Minyoung Kwak, Pasquale J Succi, Brian Benitez, Clara Mitchinson, Michael A Samaan, Mark G Abel, Haley C Bergstrom

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引用次数: 0

Abstract

Objectives: The current study investigated performance fatigability (PF) and time course of changes in force, electromyographic amplitude (EMG AMP) and frequency (EMG MPF), and neuromuscular efficiency (NME) during a sustained, isometric, handgrip hold to failure (HTF) using the rating of perceived exertion (RPE)-Clamp Model.

Methods: Twelve males performed a handgrip HTF anchored to RPE=5. The time to task failure (T_lim), force (N), EMG AMP and MPF, and NME (normalized force/ normalized EMG AMP) were recorded. Analyses included a paired samples t-test for PF at an alpha of p<0.05, 1-way repeated measures ANOVA across time and post-hoc t-tests (p<0.0025) for force, EMG AMP and MPF, and NME responses.

Results: The PF (pre- to post- maximal force % decline) was 38.2±11.5%. There were decreases in responses, relative to 0% T_lim, from 40% to 100% T_lim (force), at 30%, 60%, and 100% T_lim (EMG AMP), from 10% to 100% T_lim(EMP MPF), and from 50% to 65%, and 80% to 100% T_lim (NME) (p<0.0025).

Conclusions: The RPE-Clamp Model in this study demonstrated that pacing strategies may be influenced by the integration of anticipatory, feedforward, and feedback mechanisms, and provided insights into the relationship between neuromuscular and perceptual responses, and actual force generating capacity.

本刊更多论文

男性在中等知觉强度的手握力保持失败时的力量和神经肌肉反应。

研究目的本研究使用感知用力等级（RPE）-夹钳模型，对持续、等长、手握到失效（HTF）过程中的表现疲劳性（PF）以及力量、肌电图振幅（EMG AMP）和频率（EMG MPF）和神经肌肉效率（NME）的变化时间过程进行了调查：方法：12 名男性在 RPE=5 的基础上进行了手握至失败（HTF）训练。记录了任务失败时间（Tlim）、力（N）、肌电图AMP和MPF以及NME（归一化力/归一化肌电图AMP）。分析包括 PF 的配对样本 t 检验（pResults）：PF（最大力下降前与最大力下降后的百分比）为 38.2±11.5%。相对于 0% Tlim，40% 至 100% Tlim（力）、30%、60% 和 100% Tlim（肌电图 AMP）、10% 至 100% Tlim（肌电图 MPF）以及 50% 至 65% 和 80% 至 100% Tlim（NME）的反应均有所下降（p结论：本研究中的 RPE-Clamp 模型表明，起搏策略可能受到预期、前馈和反馈机制的综合影响，并为神经肌肉和知觉反应与实际发力能力之间的关系提供了见解。

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 musculoskeletal & neuronal interactions NEUROSCIENCES-PHYSIOLOGY

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Musculoskeletal and Neuronal Interactions (JMNI) is an academic journal dealing with the pathophysiology and treatment of musculoskeletal disorders. It is published quarterly (months of issue March, June, September, December). Its purpose is to publish original, peer-reviewed papers of research and clinical experience in all areas of the musculoskeletal system and its interactions with the nervous system, especially metabolic bone diseases, with particular emphasis on osteoporosis. Additionally, JMNI publishes the Abstracts from the biannual meetings of the International Society of Musculoskeletal and Neuronal Interactions, and hosts Abstracts of other meetings on topics related to the aims and scope of JMNI.