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Related Experiment Videos

Dynamic postural stability in subjects with braced, functionally unstable ankles.

Erik A Wikstrom1, Mark A Arrigenna, Mark D Tillman

  • 1University of Florida, Gainesville, FL, USA. ewikstrom@hhp.ufl.edu.

Journal of Athletic Training
|October 18, 2006
PubMed
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Prophylactic ankle stabilizers (PASs) did not improve dynamic postural stability in functional ankle instability (FAI) subjects. However, PASs may help reduce vertical impact forces during landing.

Area of Science:

  • Biomechanics
  • Sports Medicine
  • Orthopedics

Background:

  • Research on prophylactic ankle stabilizers (PASs) predominantly involves healthy individuals, limiting generalizability to the functional ankle instability (FAI) population.
  • The FAI population faces a higher risk of reinjury and frequently uses PASs, necessitating specific research.

Purpose of the Study:

  • To investigate the efficacy of PASs in enhancing dynamic postural stability among individuals with FAI.
  • To compare the effects of PASs against a no-brace condition in FAI subjects.

Main Methods:

  • A crossover design study was employed to assess the impact of PASs on dynamic postural stability and vertical ground reaction forces.
  • Twenty-eight subjects (13 males, 15 females) with unilateral FAI participated in a biomechanics laboratory setting.

Related Experiment Videos

  • The protocol involved a single-leg jump landing from a standardized height, with measurements of dynamic postural stability and ground reaction forces.

    • Main Results:

    • No significant improvement in overall dynamic postural stability was observed with the use of soft or semirigid PASs compared to the control condition.
    • A statistically significant reduction (improvement) was noted in the vertical component of stability (P < .01) with PAS application.
    • PASs demonstrated a potential role in attenuating vertical impact forces during the jump landing phase.

    Conclusions:

    • Soft and semirigid prophylactic ankle stabilizers do not enhance dynamic postural stability in individuals with functional ankle instability, as measured by the Dynamic Postural Stability Index.
    • PASs may contribute to reducing vertical impact forces, suggesting a potential benefit in mitigating landing shock.
    • Further research is warranted to explore the specific mechanisms and optimal applications of PASs in the FAI population.