RELIABILITY OF A LOADED COUNTERMOVEMENT JUMP PERFORMANCE USING THE CHRONOJUMP-BOSCOSYSTEM/ZANESLJIVOST IZVEDBE SKOKA Z NASPROTNIM GIBANJEM Z DODATNIM BREMENOM PRI UPORABI SISTEMA CHRONOJUMP-BOSCOSYSTEM

The purpose of this study was to establish the reliability of a loaded countermovement jump using the Chronojump-Boscosystem. Fifteen male college sports science and physical education major students (age: 20.0 ± 2.4 yrs; height: 162.4 ± 27.3 cm; weight: 74.5 ± 28.6 kg) volunteered to participate in the study. They performed two trials of a 20-kg loaded countermovement jump for two days separated by a one-day rest interval. The best trial for each session was kept for analysis. Reliability was determined using interclass correlation (ICC), typical error (TE), coefficient of variation (%CV) and smallest worthwhile change (SWC). The results revealed that the loaded countermovement jump posted the following values: 1.) ICC = 0.86; 2.) TE = 0.44; 3.) %CV = 6.70; and 4.) SWC = 0.46. In conclusion, a 20-kg loaded countermovement jump performance assessed by the Chronojump-Boscosystem is a reliable test. [PUBLICATION ABSTRACT]