Low-level laser therapy
quadriceps muscle
At each session, Group A received low-level laser treatment (LLLT), with infrared laser diodes, wavelength 810 nm with continuous frequency, optical output 200 mW, spot size 0.036 cmThe low-level laser deviceNine points on quadriceps muscle between each point 1 cm (Fig. Sites of trigger points of quadriceps musclesLLLT was performed with the probe perpendicular over the skin (Fig. Appling laser on quadriceps muscle