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Functional knee braces and dynamic performance: a review

J F Kramer1, T Dubowitz, P Fowler

  • 1Department of Physical Therapy, Faculty of Applied Health Sciences, University of Western Ontario, London, Canada.

Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine
|January 1, 1997
PubMed
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Functional knee braces (FKBs) show limited empirical evidence of effectiveness in anterior cruciate ligament injury patients during dynamic performance tests. Further research is needed to explore subjective and psychological impacts alongside objective measures.

Area of Science:

  • Orthopedics
  • Sports Medicine
  • Biomechanics

Background:

  • Anterior cruciate ligament (ACL) injuries are common, often requiring rehabilitation and bracing.
  • Functional knee braces (FKBs) are frequently used to support patients post-ACL injury.

Purpose of the Study:

  • To systematically review experimental research on the efficacy of FKBs in anterior cruciate ligament (ACL) injured patients during dynamic performance tests.

Main Methods:

  • A review of 12 peer-reviewed studies comparing braced and unbraced dynamic performance tests in the same subjects.
  • Studies included weight-bearing tests like hopping, running, and stair climbing, analyzed for maximal effort and matched submaximal effort variables.

Main Results:

  • FKBs showed no measurable effect in 11 of 16 maximal effort situations, were advantageous in 3, and disadvantageous in 2.

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  • In matched submaximal effort tests, 6 of 10 situations reported differences with bracing, while 4 reported no differences.

    • Conclusions:

    • Current empirical evidence from performance tests is insufficient to solely guide functional knee brace (FKB) prescription for ACL patients.
    • Future research should integrate subjective and psychological factors with objective performance data to better understand FKB efficacy.