Application of the Ratings of Perceived ExertionClamp Model to Examine the Effects of Joint Angle on the Time Course of Torque and Neuromuscular Responses During a Sustained, Isometric Forearm Flexion to Task Failure.
The present study used the ratings of perceived exertion (RPE)-clamp model during a sustained, isometric forearm flexion task to failure to determine the effects of joint angle on torque and neuromuscular responses. Twelve college-aged women performed two 3-second maximal voluntary isometric contrac...
| Publicado en: | Journal of Strength & Conditioning Research Vol. 37; no. 5; pp. 1023 - 1034 |
|---|---|
| Autores principales: | , , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Lippincott Williams & Wilkins
May2023
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=163815072&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 163815072 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10648011 JSC jtl: Journal of Strength & Conditioning Research issn: 10648011 maglogo: N pubinfo: dt: May2023 vid: 37 iid: 5 pid: 5086 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 163815072 163815072 163815072 10.1519/jsc.0000000000004357 163815072 ppf: 1023 ppct: 11 formats: tig: atl: Application of the Ratings of Perceived ExertionClamp Model to Examine the Effects of Joint Angle on the Time Course of Torque and Neuromuscular Responses During a Sustained, Isometric Forearm Flexion to Task Failure. aug: au: Smith, Robert W. Housh, Terry J. Anders, John Paul V. Neltner, Tyler J. Arnett, Jocelyn E. Schmidt, Richard J. Johnson, Glen O. affil: Department of Nutrition and Health Sciences, Human Performance Laboratory, University of Nebraska—Lincoln, Lincoln, Nebraska. sug: subj: Torque Neuromuscular Control Forearm Physiology Exertion Task Performance and Analysis Isometric Exercises Human Electromyography Biceps Brachii Muscles Repeated Measures Analysis of Variance Post Hoc Analysis Descriptive Statistics Neurons Physical Performance Students, College Female Elbow Joint Physiology Female ab: The present study used the ratings of perceived exertion (RPE)-clamp model during a sustained, isometric forearm flexion task to failure to determine the effects of joint angle on torque and neuromuscular responses. Twelve college-aged women performed two 3-second maximal voluntary isometric contractions at elbow joint angles (EJ) of 75˚, 100˚, and 125˚ before sustained, isometric, forearm flexions anchored to RPE = 7 to task failure (defined as RPE >7, or the torque was reduced to zero) at EJ75, EJ100, and EJ125. The amplitude (AMP) and frequency (MPF) of the electromyographic (EMG) and mechanomyographic (MMG) signals from the biceps brachii were recorded. Repeated-measures ANOVAs and post hoc comparisons were used to examine differences across time and between joint angles for torque and neuromuscular parameters. A p-value ≤ 0.05 was considered significant. For each joint angle, there was a decrease (p <0.05) in torque across the sustained, isometric task. Collapsed across joint angle, there were decreases (p <0.001, η²p 5 0.378) in EMG AMP from 30 to 100% time to task failure. No changes were observed, however, for the other neuromuscular responses. The subjects voluntarily reduced torque to maintain RPE 5 7 for each joint angle, and we hypothesize that RPE was maintained by afferent feedback from group III/IV motor neurons and corollary discharge (efferent copy of an internal signal that develops from central motor commands). The RPE-Clamp Model may be extended to athletes recovering from injury because a self-selected exercise intensity may be perceived as more enjoyable and promote adherence. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|