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Efficacy of low level laser therapy associated with exercises in knee osteoarthritis: a randomized double-blind study

Author: Alfredo PP, Bjordal JM, Dreyer SH, Rúbia S, Meneses F, Zaguetti G, Ovanessian V, Fukuda TY, Steagall Junior W, Martins RABL, Casarotto RA, Marques AP

A randomized double-blind placebo-controlled trial of forty participants with knee osteoarthritis, aged between 50 and 75 years.  There were two treatment groups: the laser group (laser therapy dose of 3 J per point for a total dose of 27J per knee and exercises) or placebo group (placebo laser and exercises).  Treatment laser was a 904 nm superpulsed laser. Outcome measures included pain (visual analogue scale (VAS)), functionality, range of motion, muscular strength, and activity. At the end of 11 weeks, participants in the laser group had significant improvement, relative to baseline, compared to the the placebo group. The findings suggest that low level laser therapy when associated with exercises is effective in yielding pain relief, function and activity on patients with osteoarthritis of the knees.

Published:  Clinical Rehabilitation. 2011; 26(6): 523-533.  doi: 10.1177/0269215511425962
Keywords:  Osteoarthritis, low level laser therapy, exercises, knee

About the author(s)

Alfredo PP, Bjordal JM, Dreyer SH, Rúbia S, Meneses F, Zaguetti G, Ovanessian V, Fukuda TY, Steagall Junior W, Martins RABL, Casarotto RA, Marques AP

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