Abstract
ABSTRACT Purpose: to analyze the influence of low-level laser on muscle performance and to identify the most used dosimetric parameters. Methods: the search for articles was carried out on the PubMed, BVS, Web of Science and SciELO platforms. The articles selected were original ones, with available abstracts and that evaluated the use of photobiomodulation on muscular performance. The data were analyzed according to the author, year of publication, sample, place of application, parameters evaluated, wavelength, dosimetry used and results found. Results: the final sample consisted of 27 articles published between 2008 and 2017. The sample size in the studies ranged from 8 to 60 individuals, aged from 17 to 70 years. A greater use of infrared wavelength, with punctual applications carried out in the path of the muscle, was observed. Regarding the dose, there was a variation from 0.24 to 50 joules per point. Of the total, only 5 (18.5%) studies had not found significant answers for the considered variables. Conclusion: most of the studies pointed out that low-level laser can improve muscle performance. The methodology used in the work was diversified, rendering data compilation difficult, being impossible to set the ideal parameters for this purpose.
Highlights
The effects of phototherapy on the muscular system have been the object of study of professionals dedicated to muscle rehabilitation and sports performance[1]
Given that muscle activity requires high energy expenditure, it is believed that resources which optimize adenosine triphosphate (ATP) synthesis may positively intervene in the functional performance[1]
Exclusion criteria were the exclusive use of other therapeutic light sources, such as the Light Emitting Diode (LED), the pulsed light and the high power laser
Summary
The effects of phototherapy on the muscular system have been the object of study of professionals dedicated to muscle rehabilitation and sports performance[1]. Among the main findings reported in the literature are the performance improvement[1], fatigue reduction[2], greater strength gain[3] and relaxation[4,5]. These results are believed to occur due to the biomodulatory action that light can exert on the body. Given that muscle activity requires high energy expenditure, it is believed that resources which optimize ATP synthesis may positively intervene in the functional performance[1]
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