Ula Issa, Israa Fuad. Exercises using the verti max device and its impact on developing endurance, the special strength of the throwing arm and the achievement of javelin throwing for players under 16 years old . ms [Internet]. 2022 Sep. 25 [cited 2024 May 12];21(3):0047. Available from: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/939