research paper: selected kinematic characteristics analysis of knee and ankle joints during block jump among elite junior volleyball players

Purpose: the present study examined selected kinematic characteristics analysis of knee and ankle joints during block jump in elite junior volleyball players. methods: thirty male junior elite volleyball players (mean±sd age: 18.14±1.12 y, height: 197.10±3.16 cm, sports history: 4.39±0.95 y, & weight: 771.20±59.83 n) participated in this study. a time-synchronized 5-camera sampling at 100 hz was used to determine the three dimensional (3d) coordinates of markers. kolmogorov-smirnov test, linear regression, and magnitude of coefficient were used in spss to analyze the obtained data (p<0.05). results: the mean±sd height of block jump was 45.5±2.06 cm, and the mean±sd angles of knee and ankle flexion were 93.37±4.75 and 21.25±2.98 cm, respectively. moreover, there was a negative relationship between knee and ankle flexion angle and block jump height (-0.051, -0.054, respectively) (p<0.05). however, smaller knee flexion angles had more negative effect on block jump height (0.741) (p<0.05). conclusion: the study results could be used by coaches as a simple tool in jumping performance among junior volleyball players. the obtained data could also be beneficial in the efficient control of applied training procedures.