alaa wissam, and Suaad Abdhussain. “Effect of Constant Stretching Exercises in Improving the Elasticity of Cervical Vertebrae for Patients With Cervical spondylitis’s for Ages (40-50) Years”. Modern Sport 21, no. 1 (March 30, 2022): 0075. Accessed May 3, 2024. https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/866.