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Published in: European Journal of Applied Physiology 6/2020

01-06-2020 | Fatigue | Original Article

Relationship between recovery of neuromuscular function and subsequent capacity to work above critical power

Authors: Leandro Camati Felippe, Taynara Gonçalves Melo, Marcos D. Silva-Cavalcante, Guilherme Assunção Ferreira, Daniel Boari, Romulo Bertuzzi, Adriano E. Lima-Silva

Published in: European Journal of Applied Physiology | Issue 6/2020

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Abstract

Purpose

To investigate the relationship between the recovery of neuromuscular fatigue and the recovery of amount of work done above critical power ().

Methods

Ten healthy men performed, on different days, constant work rate exercises until task failure to determine critical power (CP) and . In the three following visits, participants performed two exhausting constant work rate exercises estimated to induce task failure within 6 min (P61 and P62), interspaced by 3, 6 or 15 min of recovery. Neuromuscular function was assessed before and periodically after the P61 using percutaneous electrical femoral nerve stimulation. The W´ recovery was measured from the total work performed above CP during the P62.

Results

The P61 induced a full use of and a reduction in maximal voluntary contraction (MVC, − 19 ± 4%), voluntary activation (VA, − 6 ± 2%) and twitch force stimulated at 1 Hz (− 37 ± 11%), 10 Hz (− 50 ± 16%) and 100 Hz (− 32 ± 11%), when compared to baseline (P < 0.05). The time constant of VA recovery was significantly faster than the time constant of W´ recovery (P < 0.05), but there was no significant difference between the time constant of W´ recovery and the time constant of recovery of MVC or twitch force stimulated at 1, 10 and 100 Hz (P > 0.05). However, the time constant of W´ recovery was only associated to the time constant of MVC recovery (r = 0.73, P < 0.05).

Conclusion

The W´ recovery is not associated to the recovery of peripheral or central fatigue alone. Rather, W´ seems to be associated to the recovery of the overall capacity to generate force.
Literature
go back to reference Gandevia SC, Allen GM, Butler JE, Taylor JL (1996) Supraspinal factors in human muscle fatigue: evidence for suboptimal output from the motor cortex. J Physiol 490(Pt 2):529–536CrossRefPubMedPubMedCentral Gandevia SC, Allen GM, Butler JE, Taylor JL (1996) Supraspinal factors in human muscle fatigue: evidence for suboptimal output from the motor cortex. J Physiol 490(Pt 2):529–536CrossRefPubMedPubMedCentral
Metadata
Title
Relationship between recovery of neuromuscular function and subsequent capacity to work above critical power
Authors
Leandro Camati Felippe
Taynara Gonçalves Melo
Marcos D. Silva-Cavalcante
Guilherme Assunção Ferreira
Daniel Boari
Romulo Bertuzzi
Adriano E. Lima-Silva
Publication date
01-06-2020
Publisher
Springer Berlin Heidelberg
Keyword
Fatigue
Published in
European Journal of Applied Physiology / Issue 6/2020
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-020-04338-0

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