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Published in: European Journal of Applied Physiology 11/2022

24-08-2022 | Motor Evoked Potential | Original Article

Acute effects of quadriceps muscle versus tendon prolonged local vibration on force production capacities and central nervous system excitability

Authors: Djahid Kennouche, Giorgio Varesco, Loïc Espeit, Léonard Féasson, Robin Souron, Vianney Rozand, Guillaume Y. Millet, Thomas Lapole

Published in: European Journal of Applied Physiology | Issue 11/2022

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Abstract

Purpose

The present study aimed to directly compare the effects of 30 min muscle (VIBmuscle) vs. tendon (VIBtendon) local vibration (LV) to the quadriceps on maximal voluntary isometric contraction (MVIC) and rate of torque development (RTD) as well as on central nervous system excitability (i.e. motoneuron and cortical excitability).

Methods

Before (PRE) and immediately after (POST) LV applied to the quadriceps muscle or its tendon, we investigated MVIC and RTD (STUDY #1; n = 20) or vastus lateralis (VL), vastus medialis (VM) and rectus femoris (RF) electromyography responses to thoracic electrical stimulation (TMEPs; motoneuron excitability) and transcranial magnetic stimulation (MEPs; corticospinal excitability) (STUDY #2; n = 17). MEP/TMEP ratios were further calculated to quantify changes in cortical excitability.

Results

MVIC decreased at POST (P = 0.017) without any difference between VIBtendon and VIBmuscle, while RTD decreased for VIBtendon (P = 0.013) but not VIBmuscle. TMEP amplitudes were significantly decreased for all muscles (P = 0.014, P < 0.001 and P = 0.004 for VL, VM and RF, respectively) for both LV sites. While no changes were observed for MEP amplitude, MEP/TMEP ratios increased at POST for VM and RF muscles (P = 0.009 and P = 0.013, respectively) for both VIBtendon and VIBmuscle.

Conclusion

The present results suggest that prolonged muscle and tendon LV are similarly effective in modulating central nervous system excitability and decreasing maximal force. Yet, altered explosive performance after tendon but not muscle LV suggests greater neural alterations when tendons are vibrated.
Literature
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Metadata
Title
Acute effects of quadriceps muscle versus tendon prolonged local vibration on force production capacities and central nervous system excitability
Authors
Djahid Kennouche
Giorgio Varesco
Loïc Espeit
Léonard Féasson
Robin Souron
Vianney Rozand
Guillaume Y. Millet
Thomas Lapole
Publication date
24-08-2022
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Applied Physiology / Issue 11/2022
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-022-05028-9

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