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, vol. 21, no. 1, Mar. 2022, p. 0075, https://doi.org/10.54702/msj.2022.21.1.0075.