In this single-centre, two-arm randomised controlled trial, we enrolled Chinese patients aged 20–60 years with active neck extension disorder, regardless of prior exposure to manual therapy. We randomly assigned 160 patients to one of the following two arms: Jingjin therapy or general manual therapy. Both groups underwent six treatment sessions: the first three sessions were administered daily, and the last three sessions were administered every other day. The primary outcome was the between-group difference in the angle of active neck extensi...
