I had suffered a stiff and tight muscle at my left shoulder and neck that caused me sleepless.This is believed to be caused by incorrect sitting posture & long-time sitting.Then I approached YAPCHANKOR for a  7 days treatment.From day 1 till day 7,not only my pain subdue after 2 days,my muscle also are not stiff anymore.At this moment after the treatment,my left shoulder & neck are back to normal (no stiff,sleep better & exercise able).and the movement are more flexible.P.S the therapist & staff are also friendly.”