Adriane Aver Vanin1,2, Thiago De Marchi3, S S Tomazoni4, Olga Tairova5, Heliodora Leão Casalechi1, Paulo de Tarso Camillo de Carvalho2,6, Jan Magnus Bjordal7, Ernesto Cesar Leal-Junior1,2,6. 1. 1 Laboratory of Phototherapy in Sports and Exercise, Universidade Nove de Julho (UNINOVE) , São Paulo, Brazil . 2. 2 Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE) , São Paulo, Brazil . 3. 3 Postgraduate Program in Biotechnology, University of Caxias do Sul , Caxias do Sul, Brazil . 4. 4 Department of Pharmacology, University of São Paulo , São Paulo, Brazil . 5. 5 Sports Medicine Institute, University of Caxias do Sul , Caxias do Sul, Brazil . 6. 6 Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE) , São Paulo, Brazil . 7. 7 Physiotherapy Research Group, Department of Global Public Health, Faculty of Medicine and Dentistry, University of Bergen , Bergen, Norway .
Abstract
AIM: This study aimed to evaluate the medium-term effects of low-level laser therapy (LLLT or photobiomodulation) in postexercise skeletal muscle recovery and performance enhancement and to identify the optimal dose of 810 nm LLLT. MATERIALS AND METHODS: A randomized, double-blind, placebo-controlled trial was performed, with voluntary participation of 28 high-level soccer athletes. We analyzed maximum voluntary contraction (MVC), delayed onset muscle soreness (DOMS), creatine kinase (CK) activity, and interleukin-6 (IL-6) expression. The assessments were performed before exercise protocols, after 1 min, and 1, 24, 48, 72, and 96 h after the end of eccentric exercise protocol used to induce fatigue. LLLT was applied before eccentric exercise protocol with a cluster with five diodes, and dose of 10, 30, or 50 J (200 mWand 810 nm) in six sites of quadriceps. RESULTS:LLLT increased (p < 0.05) MVC from immediately after exercise to 24 h with 50 J dose, and from 24 to 96 h with 10 J dose. Both 10 J then 50 J dose decreased (p < 0.05) CK and IL-6 with better results in favor of 50 J dose. However, LLLT had no effect in decreasing DOMS. No differences (p > 0.05) were found for 30 J dose in any of the outcomes measured. CONCLUSIONS: Pre-exercise LLLT, mainly with 50 J dose, significantly increases performance and improves biochemical markers related to skeletal muscle damage and inflammation.
RCT Entities:
AIM: This study aimed to evaluate the medium-term effects of low-level laser therapy (LLLT or photobiomodulation) in postexercise skeletal muscle recovery and performance enhancement and to identify the optimal dose of 810 nm LLLT. MATERIALS AND METHODS: A randomized, double-blind, placebo-controlled trial was performed, with voluntary participation of 28 high-level soccer athletes. We analyzed maximum voluntary contraction (MVC), delayed onset muscle soreness (DOMS), creatine kinase (CK) activity, and interleukin-6 (IL-6) expression. The assessments were performed before exercise protocols, after 1 min, and 1, 24, 48, 72, and 96 h after the end of eccentric exercise protocol used to induce fatigue. LLLT was applied before eccentric exercise protocol with a cluster with five diodes, and dose of 10, 30, or 50 J (200 mW and 810 nm) in six sites of quadriceps. RESULTS: LLLT increased (p < 0.05) MVC from immediately after exercise to 24 h with 50 J dose, and from 24 to 96 h with 10 J dose. Both 10 J then 50 J dose decreased (p < 0.05) CK and IL-6 with better results in favor of 50 J dose. However, LLLT had no effect in decreasing DOMS. No differences (p > 0.05) were found for 30 J dose in any of the outcomes measured. CONCLUSIONS: Pre-exercise LLLT, mainly with 50 J dose, significantly increases performance and improves biochemical markers related to skeletal muscle damage and inflammation.
Authors: Carolina G Fritsch; Maurício P Dornelles; Juliana L Teodoro; Larissa X N da Silva; Marco A Vaz; Ronei S Pinto; Eduardo L Cadore; Bruno M Baroni Journal: Eur J Appl Physiol Date: 2018-10-26 Impact factor: 3.078
Authors: Marcelo Frigero; Solange Almeida Dos Santos; Andrey Jorge Serra; Caroline Dos Santos Monteiro Machado; Leslie Andrews Portes; Paulo José Ferreira Tucci; Flavio Silva; Ernesto Cesar Leal-Junior; Paulo de Tarso Camillo de Carvalho Journal: Lasers Med Sci Date: 2018-05-28 Impact factor: 3.161