Efeitos agudos da fototerapia com a combinação de laser super-pulsado e LEDs sobre a performance subsequente: ensaio clínico randomizado, cruzado, placebo-controlado e duplo cego

Abstract

Currently, several research groups have analyzed the effects of fatigue on the incidence of muscle injuries, yield fall and departures of the activities for a prolonged period, we observed the need for more studies on recovery techniques of skeletal muscle fatigue. Some studies demonstrate that phototherapy has an important role in pre-and post-exercise muscle recovery. The objective of this study is to assess whether between two series of exercises there is an effectiveness of phototherapy, much as held before and after the activity. This is a clinical trial randomized, placebo controlled, double blind and where it will be analyzed a perception survey of fatigue, fatigue marker (lactate) and peak torque of the contraction of the exercise protocol. Will be held an exercise protocol, utilizing an isokinetic dynamometer concentric/concentric mode at a speed of 1200 /seg-1, where the subject will perform two sets of forty repetitions, the first series being held shortly after the warm-up and stretching, and the second series, performed five minutes after application of the phototherapy of 30 J or 0 J (effective dose or placebo). Our results demonstrate that the use of combination of laser and LED was beneficial in fatigue index and blood lactate analysis. We conclude therefore that the PBMT with the combination of Laser and LED applied between exercise sessions in the isokinetic dynamometer was able to improve the fatigue index and decreased blood lactate level in effective group in order to keep the subsequent performance.