title: Changes in posture associated with postural control impairment induced by ankle plantarflexor fatigue during unipedal quiet standing.
abstract: The aim of the present study was to investigate changes in joint angles and limb positions accompanying postural control impairments induced by fatigue of the ankle plantarflexor muscles and vision removal. Thirteen subjects performed unipedal standing tasks with and without vision before and after isometric fatigue of the plantarflexor muscles. Results indicated that to compensate for the negative effects of fatigue and vision removal on postural control, participants increased flexion at the ankle, knee and back while the free lower limb and the pelvis moved backward and the upper limbs forward. These strategies could be performed to increase the role of non-fatigued muscles and optimize the use of all the joints implicated in unipedal standing.
authors.affiliation: Bruyère Research Institute, Aging and Movement Research Laboratory, 43 Bruyère Street, Ottawa, ON K1N 5C8, Canada. sebastien.boyas@hotmail.com
authors.forename: Sébastien
authors.initials: S
authors.lastname: Boyas
authors.forename: Cory
authors.initials: C
authors.lastname: McGown
authors.forename: Yves
authors.initials: Y
authors.lastname: Lajoie
authors.forename: Martin
authors.initials: M
authors.lastname: Bilodeau
mesh_terms: D000843:Ankle Joint / Q000502:physiology*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000502:physiology; D035002:Lower Extremity / Q000502:physiology; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D055815:Young Adult