1. Impairment in postural control is greater when ankle plantarflexors and dorsiflexors are fatigued simultaneously than when fatigued separately
- Author
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Etienne J. Bisson, Sébastien Cadieux, Anthony Remaud, Martin Bilodeau, Baptiste Morel, Sébastien Boyas, Motricité, interactions, performance EA 4334 / Movement - Interactions - Performance (MIP), Université de Nantes - UFR des Sciences et Techniques des Activités Physiques et Sportives (UFR STAPS), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Le Mans Université (UM), Image, Modélisation, Analyse, GEométrie, Synthèse (IMAGES), Laboratoire Traitement et Communication de l'Information (LTCI), Institut Mines-Télécom [Paris] (IMT)-Télécom Paris-Institut Mines-Télécom [Paris] (IMT)-Télécom Paris, Département de Mathématiques et de statistique [UdeM- Montréal] (DMS), Université du Québec à Montréal = University of Québec in Montréal (UQAM), Motricité, interaction, performance EA 4334 (MIP), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et Techniques des Activités Physiques et Sportives (UFR STAPS), Université de Nantes (UN)-Université de Nantes (UN), Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT)-Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT), Département de Mathématiques et Statistique (DMS), and Université de Montréal (UdeM)
- Subjects
Adult ,Male ,medicine.medical_specialty ,[SDV]Life Sciences [q-bio] ,Biophysics ,Postural control ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Physical medicine and rehabilitation ,Center of pressure (terrestrial locomotion) ,Humans ,Medicine ,Orthopedics and Sports Medicine ,Muscle, Skeletal ,Postural Balance ,Eyes open ,Vision, Ocular ,ComputingMilieux_MISCELLANEOUS ,Proprioception ,Muscle fatigue ,business.industry ,Rehabilitation ,030229 sport sciences ,Biomechanical Phenomena ,medicine.anatomical_structure ,Muscle Fatigue ,Physical therapy ,Female ,Ankle ,business ,Ankle Joint ,030217 neurology & neurosurgery ,Muscle Contraction - Abstract
The aim of the present study was to compare the effects of ankle muscle fatigue on postural control when plantarflexors (PFs) and dorsiflexors (DFs) are fatigued simultaneously compared with separately. This study also investigated the recovery of postural control after fatigue. Sixteen adults (eight women and eight men) performed postural trials before and after an isokinetic fatigue task involving either (i) only PFs (308 s 1 ), (ii) only DFs (1208 s 1 ), or (iii) both PFs and DFs simultaneously. The fatigue task involved maximal contractions repeated until the torque produced decreased below 50% of the maximal torque. Postural trials lasted 30 s and were performed on one leg with eyes open (EO) or eyes closed (EC). Sway area, medio-lateral (ML) and antero-posterior (AP) positions and velocities were calculated from the center of pressure displacements. With EO, no effect of fatigue was found on postural variables. With EC, sway area and AP velocity increased only when both PFs and DFs were fatigued simultaneously. An effect of fatigue present only when both muscle groups are fatigued simultaneously could be due to impairment in the compensatory activity between agonist and antagonist muscles and/or a greater decrease in proprioception due to a greater number of fatigued muscles. In addition, when PFs and DFs were fatigued simultaneously, sway area and AP velocity returned to pre-fatigue values within 2 min, whereas a posterior shift in AP position persisted for 10 min. This last result may suggest a longer-lasting change in postural strategy needed for optimal postural control.
- Published
- 2011