Photobiomodulation Therapy in a Field Test With High-level Rugby Players

PBMT was applied employing MR4 Laser Therapy Systems manufactured by Multi Radiance Medical, Solon - OH, USA. The cluster emitter contains 12 diodes with four super-pulsed laser diodes (905 nm, 0.3125 mW average power, and 12.5 W peak power for each diode), four red LED diodes (640 nm, 15 mW average power for each diode), and four infrared LEDs diodes (875 nm, 17.5 mW average power for each diode). It was applied in direct contact with the skin to 9 sites on extensor muscles of the knee, 6 sites on knee flexors of the knee, and 2 sites on the calf of both lower limbs. To ensure blinding, the device emitted the same sounds and regardless of the programmed mode (active or placebo).