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1 Laboratoire Motricité, Interactions, Performance 2 GeM - Institut de Recherche en Génie Civil et Mécanique 3 LOA - Laboratoire ondes et acoustique

Abstract : Transient elastography consists of measuring the transverse local shear elastic modulus defined as local muscle hardness LMH. It has previously been shown that LMH is correlated to muscle activity level during non-fatiguing contractions. The aim of this study was to describe how LMH and muscle activity level change during a submaximal fatiguing constant-torque protocol. Changes in gastrocnemius medialis LMH and in surface electromyographic activities sEMG of plantar flexors induced by a submaximal isometric plantar flexion 40% of the maximal isometric torque until exhaustion were quantified. During the contraction, sEMG of each muscle increased P0.05. Active LMH assessed during the contraction did not parallel muscle activity level changes during this type of submaximal fatigue protocol. Interestingly, LMH at rest assessed in passive conditions was higher prior to the fatiguing effort P



Autor: Antoine Nordez - Arnaud Guével - Pascal Casari - Stefan Catheline - Christophe Cornu -

Fuente: https://hal.archives-ouvertes.fr/



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