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Knee bracing after ACL reconstruction: effects on postural control and proprioception
T B Birmingham1, J F Kramer, A Kirkley
1Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada. tbirming@uwo.ca
Medicine and Science in Sports and Exercise
|July 28, 2001
Summary
Anterior cruciate ligament (ACL) braces offer minor improvements in knee proprioception and balance during simple tasks. However, these benefits are small and do not translate to more challenging, functional activities, questioning their overall clinical value.
Area of Science:
- Orthopedics
- Sports Medicine
- Biomechanics
Background:
- Anterior cruciate ligament (ACL) reconstruction often leads to deficits in knee proprioception and postural control.
- Bracing is a common intervention, but its specific effects on these functional outcomes require detailed evaluation.
Purpose of the Study:
- To assess the impact of an anterior cruciate ligament (ACL) brace on knee proprioception and postural control in individuals post-reconstruction.
Main Methods:
- Thirty participants with unilateral ACL reconstruction were tested with and without their custom brace.
- Proprioception was measured using joint angle replication on an isokinetic dynamometer.
- Postural control was evaluated through single-limb balance tests on a force platform under various conditions (stable/foam surface, eyes open/closed, post-hop).
Main Results:
- The ACL brace yielded a small, statistically significant improvement in knee proprioception (reduced error).
- A significant interaction between brace condition and test situation was observed for postural control.
- The brace improved balance on a stable surface with eyes open but not in more challenging conditions; improvements were small and did not correlate significantly with proprioception measures.
Conclusions:
- ACL bracing may offer benefits for tasks with limited somatosensory demands.
- The improvements observed are small and do not consistently transfer to more complex, functionally relevant tasks.
- The clinical significance of these findings for ACL bracing efficacy remains questionable due to limited carry-over effects.