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01-05-2009 | Original Article

Effect of 830 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in humans

Authors: Ernesto Cesar Pinto Leal Junior, Rodrigo Álvaro Brandão Lopes-Martins, Adriane Aver Vanin, Bruno Manfredini Baroni, Douglas Grosselli, Thiago De Marchi, Vegard V. Iversen, Jan Magnus Bjordal

Published in: Lasers in Medical Science | Issue 3/2009

Abstract

This study aimed to investigate the effect of 830 nm low-level laser therapy (LLLT) on skeletal muscle fatigue. Ten healthy male professional volleyball players entered a crossover randomized double-blinded placebo-controlled trial. Active LLLT (830 nm wavelength, 100 mW output, spot size 0.0028 cm², 200 s total irradiation time) or an identical placebo LLLT was delivered to four points on the biceps humeri muscle immediately before exercises. All subjects performed voluntary biceps humeri contractions with a load of 75% of the maximum voluntary contraction (MVC) force until exhaustion. After active LLLT the mean number of repetitions was significantly higher than after placebo irradiation [mean difference 4.5, standard deviation (SD) ± 6.0, P = 0.042], the blood lactate levels increased after exercises, but there was no significant difference between the treatments. We concluded that 830 nm LLLT can delay the onset of skeletal muscle fatigue in high-intensity exercises, in spite of increased blood lactate levels.

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Title: Effect of 830 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in humans
Authors: Ernesto Cesar Pinto Leal Junior
Rodrigo Álvaro Brandão Lopes-Martins
Adriane Aver Vanin
Bruno Manfredini Baroni
Douglas Grosselli
Thiago De Marchi
Vegard V. Iversen
Jan Magnus Bjordal
Publication date: 01-05-2009
Publisher: Springer London
Published in: Lasers in Medical Science / Issue 3/2009
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-008-0592-9

At a glance: The STEP trials

Springer Medicine

Effect of 830 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in humans

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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