OBJECTIVE: The purpose of this randomized controlled trial was to study effects of breathing reeducation in the treatment of patients with non specific chronic neck pain. METHODS: A total of sixty eight eligible patients with chronic neck pain were randomly allocated to breathing reeducation (BR) group (n = 34) and routine physical therapy (RPT) group (n = 34). Clinical outcomes were neck pain measured through visual analogue score, cervical active range of motion through CROM device, strength of neck muscles through hand held dynamometer and endurance of neck muscles measured through craniocervical flexion test. The neck disability was measured through neck disability index (NDI) and pulmonary outcomes such as forced vital capacity (FVC), forced expiratory volume in one second (FEV1), and FEV1/FVC ratio were measured through Spirolab 4. The outcomes were assessed at baseline and at 4 and at 8 weeks from baseline. RESULTS: There were significant improvements in the BR group compared with the RPT group (p = 0.002) for cervical flexion, extension (p = 0.029), endurance (p = 0.042), strength of neck flexors (p < 0.001), neck extensors (p = 0.034). Likewise there was a significant change in NDI (p = 0.011), FEV1 (p = 0.045), FVC (p < 0.001), and FEV1/FVC ratio (p < 0.001) in the BR group compared with the RPT group. The cervical side flexion and rotation showed no significant difference in breathing reeducation group with p > 0.05. CONCLUSION: Breathing reeducation combined with routine physical therapy is an effective treatment in patients with non specific chronic neck pain. TRIAL REGISTRATION: IRCT20200226046623N1, https://www.irct.ir/trial/46240.

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