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Abstract Details

Abstract Title

The effects of low level lasertherapy on the fatigue levels in male soccer players

Abstract Theme

Sport medicine and injury prevention

Type Presentation


Abstract Authors

Felipe Guilherme Leite de Campos - State University of São Paulo (Department of Physical Therapy) - BR
Ana Claudia Muniz Renno - Federal University of São Paulo (Department of Human Movement Science) - BR
Maira Cursino - State University of São Paulo (Department of Physical Therapy) - BR
Juliana Lôbo Froio - State University of São Paulo (Department of Physical Therapy) - BR
Eduardo Federighi Baisi Chagas - University of Marilia (Department of Physical Education) - BR
Renata Lumena Altruda Pucci - State University of São Paulo (Department of Physical Therapy) - BR
Presenter Cristiane Rodrigues Pedroni - State University of São Paulo (Department of Physical Therapy) - BR

Presentation Details

Poster Exhibition Site (Local): Black - 17        Date: 4 September        Time: 8am to 7pm        Presenter: CRISTIANE PEDRONI

Abstract Resume

Background: Investigate the acute effect of low level laser therapy in strength and muscle fatigue in men’s soccer athletes. Methods: Participated 21 athletes,
divided into 2 groups: group treated with placebo laser irradiation (n = 9) and group treated with active laser irradiation (n = 11). For the analysis of muscle fatigue surface electromyography (EMG)
of the rectus femoris muscle was performed, during two maximal voluntary isometric contractions (MVIC) with a load cell coupled to leg extension. After, the athletes performed a fatigue protocol,
followed by laser application. Finally, participants were again subjected to the same initial tests. The paired t test and Wilcoxon test was used to verify the effect of laser therapy , and ANOVA for
repeated measures to observe the behavior of the median frequency. Results: There was a significant decrease in muscle strength in the placebo group (p=0,04) during MVIC 30 seconds
after irradiation; significant increase in the MF in the group irradiated during the MVIC 5 seconds after application (p=0,02). Analyzing MF in the 30 seconds MVIC, higher values were observed in the
irradiated group, with significant difference (p<0,05) between values of the second and third window pre and post-irradiation, with a less marked increase compared to the placebo group.
Conclusions: The low level laser therapy attenuated the decrease in muscle strength and reduce fatigue process due to the effort.

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