Effects of Height and added Load on kinematic drop vertical jump at Military Personnel

Title: Effects of Height and added Load on kinematic drop vertical jump in Military Personnel. Goal: This research investigated how added load affects the kinematics of lower extremities during drop vertical jump from different heights in military personnel. Methods: The character of this thesis was theoretical and empirical. It was a randomized trial with a cross-over design. The research population consisted of 23 army students (21.8 ± 1.8 years, 182.1 ± 9.4 cm 82.3 ± 7.2 kg) of Faculty of Physical Education and Sport of Charles University who performed jumps and subsequent lunges (drop vertical jump) from a height of 50 and 75 cm without non-PNZ and with PNZ (21.45 kg) of load carry. Dartfish (10.0) was used for dynamic valgus analysis. The data obtained were descriptively and statistically analyzed in Jasp (0.16.2) using repeated measures analysis of variance. The level of statistical significance was set at α=0.05. Eta-squared was calculated at η2 =0.066 and Cohen's d at d=0.626. Results: There was no evidence of main effect of load bearing with different jump heights on dynamic knee valgus. The descriptive statistics yielded only positive values for knee angles, indicating only dynamic varus. However, the effect of load carry and jump height on lower limb kinematics showed the following..