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RESEARCH PRODUCT

Effects of plantar flexor muscle fatigue induced by electromyostimulation on postural coordination

Florent FouqueViolaine CahouetAlain MartinAntoine Ponce

subject

AdultMalemedicine.medical_specialtyMovementPosturePlantar flexion03 medical and health sciences0302 clinical medicinePhysical medicine and rehabilitationIsometric ContractionHumansMedicine[PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]Muscle SkeletalRelative phases[ PHYS.MECA.BIOM ] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]LegHipMuscle fatiguebusiness.industryGeneral Neuroscience[SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph]030229 sport sciencesFlexor musclesAdaptation PhysiologicalElectric StimulationConstraintmedicine.anatomical_structureTorqueMuscle FatiguePhysical therapyAnkle[ SPI.MECA.BIOM ] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph]Anklebusiness030217 neurology & neurosurgeryMuscle Contraction

description

International audience; The aim of the present study was to investigate the influence of a modification of an intrinsic capacity (plantar flexor strength) on the implementation of in-phase and anti-phase mode of coordination. Analysis of hip and ankle relative phases during fore-aft tracking task was done before and after an electromyostimulation fatigue protocol on the soleus muscles. Results showed participants used exclusively in-phase and anti-phase modes of coordination, with a sudden switch from one to the other with target frequency increase. Regarding tracking tasks, fatigue induces a decrease of performance for lower frequencies, and a significant decrease of switch frequency (−0.08 Hz) for each subject. In conclusion, changes in mode of coordination implementation suggest that the in-phase mode implementation is highly linked to the strength production capacity at the ankle joint.

https://doi.org/10.1016/j.neulet.2006.10.025