Article

Objective: To investigate the effects of high-velocity resistance training on
muscle function, muscle properties, and physical performance in patients with hip
osteoarthritis by comparison with those of low-velocity resistance training.
Design: Single-blind randomized controlled trial. Setting: Home-based exercise
programmes. Subjects: A total of 46 women with hip osteoarthritis were randomly
assigned to the high-velocity
(n = 23) or low-velocity (n = 23) training group.
Interventions: Both groups underwent an eight-week daily home-based resistance
training programme using an elastic band. Exercises involved hip abduction,
extension, and flexion and knee extension. Participants in the high-velocity
group performed the concentric phase of each repetition as rapidly as possible
and returned to the initial position eccentrically in 3 s. Participants in the
low-velocity group performed both the concentric and eccentric phases in 3 s.
Main measures: The following outcome measures were evaluated: isometric muscle
strength, muscle power, muscle thickness, muscle echo intensity, maximum walking
speed, Timed Up and Go test, 3-minute walking test, Harris Hip Score, and hip
pain. Results: Decreases in the time for performing the Timed Up and Go test
(mean changes: high-velocity group -0.46 s, low-velocity group -0.23 s) and echo
intensity of the gluteus maximus (mean changes: high-velocity group -6.8,
low-velocity group -1.0) were significantly greater in the high-velocity group
than in the low-velocity group. No significant difference was observed in changes
of other outcome measures between the groups. Conclusion: This study revealed
that high-velocity training for patients with hip osteoarthritis has partially a
greater effect on muscle properties and physical performance than low-velocity
training.

Langue : ANGLAIS