AU - Fatahi, Ali AU - Sadeghi, Heydar AU - Yousefian Molla, Razieh AU - Ameli, Mitra TI - Selected Kinematic Characteristics Analysis of Knee and Ankle Joints During Block Jump Among Elite Junior Volleyball Players PT - JOURNAL ARTICLE TA - USWR JN - USWR VO - 9 VI - 3 IP - 3 4099 - http://ptj.uswr.ac.ir/article-1-395-en.html 4100 - http://ptj.uswr.ac.ir/article-1-395-en.pdf SO - USWR 3 ABĀ  - 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. CP - IRAN IN - Tehran, Iran LG - eng PB - USWR PG - 161 PT - Research YR - 2019