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European Journal of Applied Physiology

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19.11.2019 | Invited Review

Peripheral fatigue: new mechanistic insights from recent technologies

verfasst von: Emiliano Cè, Stefano Longo, Eloisa Limonta, Giuseppe Coratella, Susanna Rampichini, Fabio Esposito

Erschienen in: European Journal of Applied Physiology | Ausgabe 1/2020

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Abstract

Peripheral fatigue results from multiple electrochemical and mechanical events in the cell body and the muscle–tendon complex. Combined force and surface electromyographic signal analysis is among the most widely used approaches to describe the behaviour of a fatigued muscle. Advances in technologies and methodological procedures (e.g. laser diffraction, ³¹P magnetic resonance spectroscopy, shear-wave elastography, tensiomyography, myotonometry, mechanomyography, and high-density surface electromyography) have expanded our knowledge of muscle behaviour before, during, and after a fatiguing task. This review gives an update on recent developments in technologies for investigating the effects of peripheral fatigue linked to skeletal muscle contraction and on mechanistic insights into the electrochemical and mechanical aspects of fatigue. The salient points from the literature analysis are: (1) the electrochemical and mechanical events in the cell (alterations in cross-bridge formation and function and in depolarization of the tubular membrane) precede the events taking place at the muscle–tendon complex (decrease in muscle–tendon unit stiffness); (2) the changes in the fatigued muscle are not homogenous along its length and width but rather reflect a functional compartmentalisation that counteracts the decline in performance; (3) fatigue induces changes in load sharing among adjacent/synergistic muscles. A focus of future studies is to observe how these regional differences occur within single muscle fibres. To do this, a combination of different approaches may yield new insights into the mechanisms underlying muscle fatigue and how the muscle counteracts fatigue.

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Titel: Peripheral fatigue: new mechanistic insights from recent technologies
verfasst von: Emiliano Cè
Stefano Longo
Eloisa Limonta
Giuseppe Coratella
Susanna Rampichini
Fabio Esposito
Publikationsdatum: 19.11.2019
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Applied Physiology / Ausgabe 1/2020
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-019-04264-w

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