Article 1 Breathing exercises 1 Chronic neck pain 1 Neck Disability Index 1 Respiratory muscle endurance 1 adult 1 aged 1 breathing exercise 1 breathing muscle 1 chest expansion 1 clinical article controlled study 1 endurance training 1 female 1 human 1 joint mobility 1 lung ventilation 1 male 1 muscle exercise 1 neck pain 1 outcome assessment 1 pilot study 1 priority journal 1 range of motion 1 rotation 1 visual analog scale 1