Fig. 1

Flow chart of the study. A total of 356 participants will be randomized to the two groups. The interventions will last for 15 min and will be carried out three times a week for 4 weeks. The study period will be consisted of the baseline, 2 weeks of treatment, after treatment, 1.5 and 3-month follow-up. NDI Neck Disability Index, NPQ Northwick Park Neck Pain Questionnaire, SF-36 36-item Short-Form Health Survey