title: Effect of fatiguing maximal isokinetic quadriceps contractions on ability to estimate knee-position.
abstract: This randomized controlled study compared the accuracy of knee positioning by 8 women after fatiguing maximal isokinetic contractions of the quadriceps with those of 8 controls who performed no exercise. The mean algebraic error (AE) and variable error (VE) showed a significant posttest improvement for the control group after a 5-min, intertrial period. There was no change in accuracy of knee positioning postexercise, however, for the experimental group. These findings suggest that, while a single bout of fatiguing knee exercises may not alter absolute accuracy of knee positioning, the movements may undermine the relative proficiency attainable by learning. They suggest a role for central as well as peripheral mechanisms in mediating this sensory modality.
authors.affiliation: Department of Physical Therapy, University of Alberta, Edmonton, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Marks
authors.forename: H A
authors.initials: HA
authors.lastname: Quinney
mesh_terms: D000293:Adolescent; D000328:Adult; D005221:Fatigue / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D007699:Kinesthesis / Q000502:physiology; D007719:Knee Joint / Q000294:innervation / Q000502:physiology*; D010525:Peripheral Nerves / Q000503:physiopathology; D011434:Proprioception / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology