Luciano Ramos, Ernesto Cesar Pinto Leal Junior, Rodney Capp Pallotta, Lucio Frigo, Rodrigo Labat Marcos, Maria Helena Catelli de Carvalho, Jan Magnus Bjordal and Rodrigo Álvaro Brandão Lopes-Martins Infrared (810 nm) Low-Level Laser Therapy in Experimental Model of Strain-Induced Skeletal Muscle Injury in Rats: Effects on Functional Outcomes Photochemistry and Photobiology 88
In this work we investigated effects of LLLT and diclofenac on functional outcomes in the acute stage after muscle strain injury in rats. The injured groups received either no treatment, or a single treatment with diclofenac 30 min prior to injury, or LLLT (810 nm, 100 mW) with doses of 1, 3, 6 or 9 J, at 1 h after injury. All treatments (except 9 J LLLT) significantly improved the walking index 12 h postinjury compared with the untreated group. The 3 J group also showed a significantly better walking index than the drug group. All treatments significantly improved muscle performance at 6 and 12 h. LLLT dose of 3 J was as effective as the pharmacological agent.
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