Prior Involvement of Central Motor Drive Does Not Impact Performance and Neuromuscular Fatigue in a Subsequent Endurance Task.
Purpose: This study evaluated whether central motor drive during fatiguing exercise plays a role in determining performance and the development of neuromuscular fatigue during a subsequent endurance task. Methods: On separate days, 10 males completed three constant-load (80% peak power output), sing...
| Publicado en: | Medicine & Science in Sports & Exercise Vol. 54; no. 10; pp. 1751 - 1761 |
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| Autores principales: | , , , , , , , , , |
| Formato: | research tables/charts tracings Journal Article |
| Publicado: |
Lippincott Williams & Wilkins
Oct2022
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| 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=159138061&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 159138061 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01959131 4DP jtl: Medicine & Science in Sports & Exercise issn: 01959131 maglogo: N pubinfo: dt: Oct2022 vid: 54 iid: 10 pid: 433 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 159138061 159138061 159138061 10.1249/MSS.0000000000002965 159138061 ppf: 1751 ppct: 10 formats: tig: atl: Prior Involvement of Central Motor Drive Does Not Impact Performance and Neuromuscular Fatigue in a Subsequent Endurance Task. aug: au: LAGINESTRA, FABIO GIUSEPPE CAVICCHIA, ALESSANDRO VANEGAS-LOPEZ, JENNIFER E. BARBI, CHIARA MARTIGNON, CAMILLA GIURIATO, GAIA PEDRINOLLA, ANNA AMANN, MARKUS HUREAU, THOMAS J. VENTURELLI, MASSIMO affil: Department of Neuroscience, Biomedicine, and Movement, University of Verona, Verona, ITALY sug: subj: Muscle Fatigue Quadriceps Muscles Physiology Physical Performance Evaluation Physical Endurance Exercise Intensity Task Performance and Analysis Human Knee Joint Physiology Extension Muscle Contraction Electric Stimulation Muscle Strength Exertion Electromyography Descriptive Statistics Young Adult Male Male ab: Purpose: This study evaluated whether central motor drive during fatiguing exercise plays a role in determining performance and the development of neuromuscular fatigue during a subsequent endurance task. Methods: On separate days, 10 males completed three constant-load (80% peak power output), single-leg knee-extension trials to task failure in a randomized fashion. One trial was performed without preexisting quadriceps fatigue (CON), and two trials were performed with preexisting quadriceps fatigue induced either by voluntary (VOL; involving central motor drive) or electrically evoked (EVO; without central motor drive) quadriceps contractions (~20% maximal voluntary contraction (MVC)). Neuromuscular fatigue was assessed via pre–post changes in MVC, voluntary activation (VA), and quadriceps potentiated twitch force (Q tw,pot). Cardiorespiratory responses and rating of perceived exertion were also collected throughout the sessions. The two prefatiguing protocols were matched for peripheral fatigue and stopped when Q tw,pot declined by ~35%. Results: Time to exhaustion was shorter in EVO (4.3 ± 1.3 min) and VOL (4.7 ± 1.5 min) compared with CON (10.8 ± 3.6 min, P < 0.01) with no difference between EVO and VOL. ΔMVC (EVO: −47% ± 8%, VOL: −45% ± 8%, CON: −53% ± 8%), Δ Q tw,pot (EVO: −65% ± 7%, VOL: −59% ± 14%, CON: −64% ± 9%), and ΔVA (EVO: −9% ± 7%, VOL: −8% ± 5%, CON: −7% ± 5%) at the end of the dynamic task were not different between conditions (all P > 0.05). Compared with EVO (10.6 ± 1.7) and CON (6.8 ± 0.8), rating of perceived exertion was higher (P = 0.05) at the beginning of VOL (12.2 ± 1.0). Conclusions: These results suggest that central motor drive involvement during prior exercise plays a negligible role on the subsequent endurance performance. Therefore, our findings indicate that peripheral fatigue–mediated impairments are the primary determinants of high-intensity single-leg endurance performance. pubtype: Academic Journal doctype: research tables/charts tracings Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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