Judesių variabilumas taikant ekscentrinės perkrovos treniruotes: įžvalgos apie treniruotės sąlygas ir ryšį su rezultato pokyčiais

Problem: Literature is lacking about the training effects on functional performance through the use of flywheel machine (De Hoyo et al., 2015) as well, research about movement variability in resistance training is very limited. Purpose: This study aims to examine velocity, power and movement variability in eccentric overload training (EOT). Objectives: 1. To examine difference between unidirectional and multidirectional movements, power and velocity outputs. 2. To examine movement variability occurring in EOT exercises between unidirectional and multidirectional movements. 3. Examine the effect of EOT on a single leg countermovement jump (horizontal, vertical, lateral) between the constant and variable group. Methods: Experiment of a 6-weeks of EOT using a flywheel device was performed. 2 exercises (Back Lunge [BL] and Shuffle Step [SS] in right and left directions), 1 set x 6-8 reps, 2 in a week. The constant (n=7) group performed the exercises in only one direction, while the variable (n=6) group performed exercises in three different directions, in random order. Results: In BL, the constant group produced significantly more power (391 > 272 watts; p = 0.03) and velocity (0,52 m/s > 0,41 m/s; p = 0.01) than variable group during the concentric phase. Regarding movement variability, no significant changes were found between any exercises between the constant or variable groups. Conclusions: No clear evidence regarding power and velocity between unidirectional and multidirectional movements, however multidirectional movements could be superior for specificity training. Regarding movement variability, it could be used to analyze performance outcome