Krawczyk M, Pociecha M. INFLUENCE OF A 6-WEEK MIXED BALLISTIC-PLYOMETRIC TRAINING ON THE LEVEL OF SELECTED STRENGTH AND SPEED INDICES OF THE LOWER LIMBS IN YOUNG FOOTBALL PLAYERS. SIE [Internet]. 2019 May 21 [cited 2024 Nov. 25];4:198-206. Available from: https://journals.rta.lv/index.php/SIE/article/view/3718