“The Effects of Different Conditioning Contraction Protocols of Post-Activation Performance Enhancement on Variables of Eccentric Phases and Concentric Phase of Vertical Jumps”. Journal of Physical Education and Sport 22, no. 7 (July 31, 2022): 1694–1707. Accessed November 16, 2026. https://efsupit.ro/index.php/jpes/article/view/1380.