title: The effect of velocity on load range during isokinetic hip abduction and adduction exercise.
abstract: The purpose of this study was to quantify the components of acceleration, load range and deceleration through a velocity spectrum during concentric hip abduction and adduction isokinetic exercise, and to investigate the effect of load range on peak torque and work done. 16 male healthy subjects performed 3 maximal concentric reciprocal hip abduction and adduction gravity corrected repetitions in a fixed order at 60, 120, 180, 240, 300, 360 and 420° · s-1, with a 30 s rest between velocities. Hip abduction and adduction results revealed that load range significantly decreased while acceleration and deceleration ROM significantly increased (p<0.05) with each increase in velocity. When the total peak torque data was corrected for load range there was a significant decrease (p<0.05) in peak torque at velocities of 300° · s-1 and above, for both hip abduction and adduction. Load range correction also resulted in a significant decrease (p<0.05) in work done at velocities of 120° · s-1 and above, for both hip abduction and adduction. The results demonstrate an inverse relationship between isokinetic velocity and load range during concentric hip abduction and adduction, and suggest a need for the clinician to carefully consider velocity selection when performing exercise on an isokinetic device.
authors: Sport, Health and Exercise, University of Hertfordshire, Hertfordshire, United Kingdom. c.gautrey@herts.ac.uk
authors: C N
authors: CN
authors: Gautrey
authors: T
authors: T
authors: Watson
authors: A
authors: A
authors: Mitchell
mesh_terms: D000054:Acceleration; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000379:methods; D006621:Hip Joint / Q000502:physiology*; D006801:Humans; D008297:Male; D016059:Range of Motion, Articular / Q000502:physiology*; D013997:Time Factors; D019415:Torque; D055815:Young Adult