Fototerapia aplicada em associação ao treinamento aeróbio: avaliação de diferentes protocolos de irradiação

Abstract

The benefits of a program of a regular physical activity already have been proven in several studies. These benefits related to a state of social, emotional and physical well-being, promoting healthy individuals as well as in pathological conditions, searching an improvement of the quality of life and therefore better performance. The effect of the photobiomodulation with Laser and/or light-emitting diodes of low potency therapy in humans, the improvement of the performance and muscular recovery has been widely studied, however the effects in long-term and the ideal moment of application of the technique still need to be defined. The purpose of this study was to investigate the ideal moment for application of the irradiation with Lasers and LEDs, associated to a regular aerobic training, in order to optimize the muscular performance. 96 volunteers were recruited of both genders, aged between 18 and 35 years. They were submitted to a treadmill protocol associated with photobiomodulation active or placebo before and/or after each training session held during 12 weeks. They attended 3 sessions per week with the assessments made before the beginning of the protocol and after 4, 8 and 12 weeks. For the irradiation a cluster of 12 diodes was used, being 4 diodes super pulsed infrared 905 nm, 4 diodes of LED infrared 875 nm and 4 diodes of LED red 640 nm, manufactured for the Multi Medical Radiance TM. A dose of 30 J per irradiation was applied to 17 different places in each lower limb to evaluate the aerobic performance of the volunteers (VO2max and time until exhaustion) and to the body composition (percentage of fat). PBMT Group + PBMT volunteers showed a significant improvement until the time of exhaustion (119, 19±10.07%) and maximum oxygen consumption (120, 20±16,62) compared to the Placebo Group + Placebo (109, 75±9.64% and 106,41±19.54%). Also a statistical significance decrease in the percentage of fat (86, 13±12,56 x 96, 11±11.20%) was noted in the twelfth week. There was no statistical difference in the comparisons made between the other groups. In conclusion the application of the photobiomodulation associated with aerobic exercise improves performance if applied before and after training sessions.