Infrared Low-Level Laser Therapy (Photobiomodulation Therapy) before Intense Progressive Running Test of High-Level Soccer Players: Effects on Functional, Muscle Damage, Inflammatory, and Oxidative Stress Markers—A Randomized Controlled Trial

Table 1

PBMT parameters and specifications.

Wavelength	810 nm (infrared)
Number of diodes	5
Frequency	Continuous output
Optical output (per diode)	100 mW or 0 mW (placebo)
Spot size (per diode)	0.0364 cm^2
Power density (per diode)	2.75 W/cm^2 or 0.00 W/cm^2 (placebo)
Energy (per diode)	10 J
Energy density (per diode)	275 J/cm^2 or 0 J/cm^2 (placebo)
Exposure time	100 s
Number of irradiated sites per lower limb	9 sites on knee extensor muscles (3 medial, 3 lateral, and 3 central); 6 sites on knee flexor muscles (3 medial and 3 lateral); 2 sites on plantar flexor muscles (1 medial and 1 lateral)
Total number of points per lower limb	85
Total energy delivered per lower limb	850 J (450 J on knee extensor muscles, 300 J on knee flexor muscles, and 100 J on plantar flexor muscles)
Cluster area	9.6 cm^2
Administration technique	Cluster in stationary position with slight pressure and direct contact with skin