Motor strategy during postural control is not muscle fatigue joint-dependent, but muscle fatigue increases postural asymmetry.

ABSTRACT: The aim of this study was to investigate the effects of ankle and hip muscle fatigue on motor adjustments (experiment 1) and symmetry (experiment 2) of postural control during a quiet standing task. Twenty-three young adults performed a bipedal postural task on separate force platforms, before and after a bilateral ankle and hip muscle fatigue protocol (randomized). Ankle and hip muscles were fatigued separately using a standing calf raise protocol (ankle fatigue) on a step and flexion and extension of the hip (hip fatigue) sitting on a chair, at a controlled movement frequency (0.5Hz), respectively. In both experiments, force, center of pressure, and electromyography parameters were measured. The symmetry index was used in experiment 2 to analyze the postural asymmetry in the parameters.

SUBMITTER: Penedo T 

PROVIDER: S-EPMC7906473 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature