Chronic neck pain (CNP) may affect the physical, social, and psychological aspects of the individual, contributing to the increase in costs in society and business. Neck pain is a major cause of morbidity and disability in everyday life and at the workplace, in many different countries and populations, but its basic pathology and pathophysiology are still unclear.~CNP patients present respiratory dysfunction and pain presence is accompanied by a varying amount of decrements in several clinical outcomes affecting the neuromusculoskeletal system like disability, range of motion restriction, and decreased proprioception as well as neuromuscular control. However, the quality of life and psychology of patients with CNP are affected in parallel. The diaphragm is the most important respiratory muscle also contributing to postural stability and spinal control. Several studies have shown that diaphragm manual therapy and breathing retraining exercises can improve respiratory, as well as pain, function, and musculoskeletal outcomes in chronic low back pain. However, the effectiveness in patients with chronic neck pain has not been definitively determined in relation to other physical therapy interventions. The primary purpose of the present study is to determine further the effectiveness of Diaphragmatic Manual Therapy and Breathing Reeducation Exercises in CNP patients. The secondary purpose is to investigate the relationship between CNP, breathing dysfunction, pain, disability, and musculoskeletal clinical outcomes.~The present study is expected to recruit 90 patients with CNP. Patients with CNP will be randomly assigned to (1) Diaphragmatic Manual Therapy plus Cervical Manual Therapy plus Breathing Reeducation Exercises (2) Cervical Manual Therapy plus sham Diaphragmatic Manual Therapy and (3) Conventional Physiotherapy. Each participant will receive a particular intervention program depending on their group allocation. All participants will receive two evaluation sessions before and after the intervention.
Chronic neck pain (CNP) is reported to be one of the most common musculoskeletal pain syndromes. Studies showed that patients with chronic neck pain compensated with changes in Pain, Function, Musculoskeletal and Respiratory outcomes. The diaphragm is a primary respiratory muscle contributing to postural stability and spinal control. Many studies showed that manual therapy and exercise improve clinical and respiratory outcomes in CNP patients. Few studies highlight the importance of diaphragm manual therapy and Reeducation Breathing Exercises in musculoskeletal diseases and in CNP patients. However, the exact mechanism is still unclear. This study aims to examine the hypothesis that: Diaphragm Manual Therapy and Breathing Reeducation Exercises combined with cervical manual therapy - improve clinical and respiratory outcomes more than cervical manual therapy intervention only or conventional physiotherapy