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Related Experiment Videos

Increased inversion angle replication error in functional ankle instability.

L Konradsen1, P Magnusson

  • 1Department of Orthopedic Surgery, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
|September 7, 2000
PubMed
Summary
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Ankle joint instability increases inversion-angle replication error. Warming up significantly reduced this error in healthy runners, suggesting improved proprioception with activity.

Area of Science:

  • Biomechanics
  • Kinesiology
  • Sports Medicine

Background:

  • Ankle joint proprioception is crucial for stability.
  • Functional ankle instability can impair joint position sense.
  • Replication error quantifies the accuracy of joint position reproduction.

Purpose of the Study:

  • To investigate inversion-angle replication error in subjects with functional ankle instability.
  • To compare error between unstable and healthy ankles.
  • To assess the effect of warm-up on replication error in athletes.

Main Methods:

  • Passive set-active replication testing was employed.
  • Measurements were taken on unilaterally unstable subjects and healthy controls.
  • Replication error was quantified in degrees of inversion angle.

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Main Results:

  • Unstable ankles exhibited significantly greater replication error (2.5°) compared to healthy contralateral ankles (2.0°, P < 0.05) and healthy controls (1.7°, P < 0.01).
  • High-level cross-country runners showed a 38% reduction in replication error after warm-up (P = 0.04).

Conclusions:

  • Functional ankle instability is associated with impaired joint position sense.
  • Warm-up may enhance proprioceptive accuracy in athletes.
  • These findings have implications for ankle injury prevention and rehabilitation strategies.