Effects of Endurance Running Training Associated With Photobiomodulation on 5-Km Performance and Muscle Soreness: A Randomized Placebo-Controlled Trial.

Cecília Segabinazi Peserico,Alessandro Moura Zagatto,Fabiana Andrade Machado

doi:10.3389/fphys.2019.00211

Cecília Segabinazi Peserico, Alessandro Moura Zagatto + Show 1 more

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https://doi.org/10.3389/fphys.2019.00211

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Abstract

This study aimed to investigate the influence of endurance running training associated with PBM on endurance performance variables and muscle soreness in untrained men. Thirty untrained men were distributed randomly into a placebo (PLA) group and photobiomodulation group (PBMG) and they performed 8 weeks of running training. The PBMG had the PBM performed before all training sessions. The PBM was applied using LED equipment with 56 diodes of red light (660 nm) and 48 diodes of infrared light (850 nm). The application was performed in 5 points per leg, with a dose of 60 J at each point and a total energy delivered per leg of 300 J. Peak running velocity, time limit tests and 5-km performance were assessed pre and post-training; muscle soreness was evaluated before all training sessions. The Vpeak increased and 5-km running time (t5–km) decreased (P < 0.001) in both groups. In addition, the magnitude based-inference analysis showed a possibly positive effect on Vpeak and t5–km and for PBMG compared to PLA group. Furthermore, there was a moderate ES of 0.82 on attenuation in muscle soreness in the third week of endurance running training. Therefore, although the magnitude-based inference analysis demonstrated a possibly positive effect on Vpeak and t5–km and for PBMG compared to PLA group and a moderate ES on attenuation in muscle soreness in the last weeks of endurance running training, no significant difference were found between PBMG and PLA interventions.

Highlights

Various methods have been used to optimize muscle recovery after exercise to facilitate the adaptations resulting from the endurance training (Vanin et al, 2018)
The 5-km running time (t5−km) decreased in the PLA group and photobiomodulation group (PBMG) (P < 0.001) with a moderate ES for the comparison between pre and posttraining (PLA = −0.82 and PBMG = −1.18) The magnitude based-inference analysis showed a possibly positive effect on Vpeak and t5−km and for PBMG compared to PLA group (Table 4)
The present study aimed to investigate the influence of endurance running training associated with PBM on endurance performance variables and muscle soreness in untrained men

Summary

Introduction

Various methods have been used to optimize muscle recovery after exercise to facilitate the adaptations resulting from the endurance training (Vanin et al, 2018). The use of lightemitting diodes (LED), as well as low-level lasers, which comprise a photobiomodulation (PBM) modality, has shown many positive effects in accelerating the recovery process after exercise (Leal Junior et al, 2015; Ferraresi et al, 2016a; Vanin et al, 2018). Dellagrana et al (2018) found that all PBM doses tested (15, 30, and 60 J per site) positively affected running economy, rate of perceived exertion (RPE), velocity at maximal oxygen uptake (vVO2max), peak running velocity (Vpeak), and total time to exhaustion in recreational runners. Mezzaroba et al (2018) investigated physically active men and reported that PBM applied prior to running enhanced maximum and submaximal VO2, increased the peak velocity (Vpeak), and reduced heart rate (HR), and Rating of Perceived Exertion (RPE) during incremental tests

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