The deep DN was administered by a physical therapist with three years of experience in the technique. The ultrasound video (SonoSite Titan; Sonosite, Bothell, WA, USA) was recorded at 60 frames per second captured through an external capture device from Epiphan Systems Inc. (Ottawa, Ontario, Canada). According to the perception of the physical therapist and the ultrasound assessment, the filament needle was inserted into the MTrP to achieve three LTRs. Posterior to DN application, the ROMs of the MG and HA were measured.