El-Ashker, Said, Amr Hassan, Redha Taiar, and Markus Tilp. 2019. “Long Jump Training Emphasizing Plyometric Exercises Is More Effective Than Traditional Long Jump Training: A Randomized Controlled Trial”. Journal of Human Sport and Exercise 14 (1):215-24. https://doi.org/10.14198/jhse.2019.141.18.