Isokinetic testing of evertor and invertor muscles in patients with chronic ankle instability. - Université Paris Nanterre Accéder directement au contenu
Article Dans Une Revue Journal of Applied Biomechanics Année : 2013

Isokinetic testing of evertor and invertor muscles in patients with chronic ankle instability.

Résumé

Ankle sprains are among the most common sport-related injuries and can lead to chronic ankle instability. Impaired sensorimotor function of the ankle musculature is often suggested as a cause. The current study sought to assess and compare the isokinetic performance and electromyographic patterns of evertor and invertor muscles in patients with chronic ankle instability and in a control group. Twelve patients with chronic ankle instability and twelve healthy subjects were included. Isokinetic eccentric and concentric testing at various angular velocities was performed for eversion and inversion movements. The corresponding myoelectric activities of the fibularis longus and tibialis anterior muscles were quantified from surface electromyographic recordings by computing average root mean square values. Patients had lower myoelectric activity of the evertor and invertor muscles than controls did; this difference could account for the eccentric weakness associated with ankle instability. Functional strength ratios revealed a dynamic strength imbalance in unstable ankle patients and that may contribute to recurrent injury. Our findings suggest that rehabilitation programs for unstable ankle patients must be focused on the motor control of eccentric contractions of the ankle evertors and invertors, to boost these muscles' contribution to ankle stabilization.
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Dates et versions

hal-01024094 , version 1 (15-07-2014)

Identifiants

  • HAL Id : hal-01024094 , version 1
  • PUBMED : 23343782

Citer

Pascal David, Mohamad Halimi, Isabelle Mora, Pierre-Louis Doutrellot, Michel Petitjean. Isokinetic testing of evertor and invertor muscles in patients with chronic ankle instability.. Journal of Applied Biomechanics, 2013, 29 (6), pp.696-704. ⟨hal-01024094⟩
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