Pubblicazioni

Autori:

Laginestra, Fabio Giuseppe; Amann, Markus; Kirmizi, Emine; Giuriato, Gaia; Barbi, Chiara; Ruzzante, Federico; Pedrinolla, Anna; Martignon, Camilla; Tarperi, Cantor; Schena, Federico F; Venturelli, Massimo

Titolo:

Electrically-induced quadriceps fatigue in the contralateral leg impairs ipsilateral knee extensors performance

Anno:

2021

Tipologia prodotto:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Lingua:

Inglese

Formato:

A Stampa

Referee:

Sì

Nome rivista:

AMERICAN JOURNAL OF PHYSIOLOGY. REGULATORY, INTEGRATIVE AND COMPARATIVE PHYSIOLOGY

ISSN Rivista:

0363-6119

N° Volume:

320

Numero o Fascicolo:

5

Intervallo pagine:

R747-R756

Parole chiave:

central command; electrical stimulation; group III and IV afferents; muscle fatigue

Breve descrizione dei contenuti:

Muscle fatigue induced by voluntary exercise, which requires central motor drive, causes central fatigue that impairs endurance performance of a different, non-fatigued muscle. This study investigated the impact of quadriceps fatigue induced by electrically-induced (no central motor drive) contractions on single-leg knee-extension (KE) performance of the subsequently exercising ipsilateral quadriceps. On two separate occasions, eight males completed constant-load (85% of maximal power-output) KE exercise to exhaustion. In a counterbalanced manner, subjects performed the KE exercise with no pre-existing quadriceps fatigue in the contralateral leg on one day (No-PreF), while on the other day, the same KE exercise was repeated following electrically-induced quadriceps fatigue in the contralateral leg (PreF). Quadriceps fatigue was assessed by evaluating pre- to post-exercise changes in potentiated twitch force (ΔQtw,pot; peripheral-fatigue), and voluntary muscle activation (ΔVA; central-fatigue). As reflected by the 57±11% reduction in electrically-evoked pulse force, the electrically-induced fatigue protocol caused significant knee-extensors fatigue. KE endurance time to exhaustion was shorter during PreF compared to No-PreF (4.6±1.2 vs 7.7±2.4 min; p<0.01). While ΔQtw,pot was significantly larger in No-PreF compared to PreF (-60% vs -52%, p<0.05), ΔVA was greater in PreF (-14% vs -10%, p<0.05). Taken together, electrically-induced quadriceps fatigue in the contralateral leg limits KE endurance performance and the development of peripheral fatigue in the ipsilateral leg. These findings support the hypothesis that the crossover-effect of central fatigue is mainly mediated by group III/IV muscle afferent feedback and suggest that impairments associated with central motor drive may only play a minor role in this phenomenon.

Pagina Web:

https://doi.org/10.1152/ajpregu.00363.2020

Id prodotto:

120061

Handle IRIS:

11562/1039625

ultima modifica:

15 novembre 2022

Citazione bibliografica:

Laginestra, Fabio Giuseppe; Amann, Markus; Kirmizi, Emine; Giuriato, Gaia; Barbi, Chiara; Ruzzante, Federico; Pedrinolla, Anna; Martignon, Camilla; Tarperi, Cantor; Schena, Federico F; Venturelli, Massimo, Electrically-induced quadriceps fatigue in the contralateral leg impairs ipsilateral knee extensors performance «AMERICAN JOURNAL OF PHYSIOLOGY. REGULATORY, INTEGRATIVE AND COMPARATIVE PHYSIOLOGY» , vol. 320 , n. 5 , 2021 , pp. R747-R756

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