Subacute Cervical Pain

The aim of this clinical study is to investigate the effectiveness of breathing training added to a standard physical therapy and exercise program in individuals with non-specific subacute neck pain. Specifically, the study will evaluate the effect of breathing training on functional loss due to neck pain and on respiratory function. The main questions it aims to answer are: * Does breathing training reduce functional loss due to neck pain in participants? * Does breathing training improve respiratory function in participants?