Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22136
Title: Does wearing a functional knee brace affect hamstring reflex time in subjects with anterior cruciate ligament deficiency during muscle fatigue?
Authors: Lam, RY
Ng, GY 
Chien, EP
Keywords: Braces
Fatigue
Knee
Ligaments
Muscles
Rehabilitation
Issue Date: 2002
Publisher: W.B. Saunders
Source: Archives of physical medicine and rehabilitation, 2002, v. 83, no. 7, p. 1009-1012 How to cite?
Journal: Archives of physical medicine and rehabilitation 
Abstract: Objective: To evaluate the effects of wearing a functional knee brace and muscle fatigue on hamstring reflex time in subjects with anterior cruciate ligament (ACL) deficiency. Design: Repeated-measures clinical trial. Setting: Outpatient physical therapy department. Participants: Sixteen subjects with ACL deficiency. Intervention: Subjects tested with and without a functional knee brace before and after an exercise protocol designed to fatigue the knee muscles. Main Outcome Measure: Latency of hamstring reflex muscle activity after sudden perturbation of the knee. Results: Wearing a knee brace shortened the hamstring reflex latency regardless of fatigue (F1.15=20.62, P<.001). Muscle fatigue lengthened the hamstring reflex time regardless of the bracing condition (F1.15=7.57, P<.015). Conclusion: Wearing a functional knee brace facilitated hamstring muscle reflex, but muscle fatigue lengthened the hamstring reflex latency. Subjects with ACL deficiency should not rely on the knee brace to facilitate hamstring reflex for joint protection during prolonged sporting activities when muscles are fatigued.
URI: http://hdl.handle.net/10397/22136
ISSN: 0003-9993
EISSN: 1532-821X
DOI: 10.1053/apmr.2002.33231
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