The laser plus exercises group ( Laser + EX : @ patients ) received low-level laser therapy ( LLLT ) with a diode laser , @nm , with a specific handpiece -LSB- @cm ( @ ) irradiation spot size , power @W in continuous wave ( CW ) , fluence @ J/cm ( @ ) , total energy per point @J -RSB- thrice weekly , and followed a daily exercise schedule for @ weeks ( @ days/week ) .