Identifying Effective Variables of Countermovement Jump Height of the Male National Basketball Team of the Islamic Republic of Iran

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Paper ID : 1117-12THCONG
Oral / Poster Presentation File: 1117-12THCONG.JPG 
1Sport Biomechanics Faculty of Physical Education University of Tehran Tehran Iran, Islamic Republic Of
2Sport Biomechanics Faculty of Physical Education University of Tehran
3National Olympic Academy of Iran
Vertical jump performance has been considered as one of the most important physical characteristics of elite basketball players. Vertical jump height may have a positive effect on jump-shots, successful rebounds and defensive situations.
Previous studies have shown positive correlations between various kinetic and kinematic parameters and achieving maximum vertical jump height Parameters like countermovement depth, velocity of eccentric phase, average power, peak power and maximum rate of force development have been found to be significantly related to jump height. However it should be noted that subjects in previous studies have been from different populations such as recreational athlete, trained students to elite players which could possibly be part of the reason for dissimilar results.
The purpose of this study was to identify the most important variables in countermovement jump of the male national basketball team of the Islamic Republic of Iran.
Nine-teen athletes (Age 23.4±3.8 Weight 96.30±16.7 Height 197.1±10.7) participated in this study. Participants were asked to perform five maximal effort countermovement jumps on a force platform (Kistler, Switzerland) with sampling frequency of 1000 Hz. The best three jump heights were selected for further analysis. Parameters such as displacement of the COM (center of mass), velocity of the COM, power output and rate of force development during both eccentric and concentric phases were calculated.
Results showed that measures of power output had the highest relationship/ correlation (p≤0.01) with jump height. In the other hand, maximum RFD values were strongly negatively (p≤0.05) related to JH. But, no significant relations were observed between Eccentric velocity, depth and the JH.
It could be concluded that development of lower extremity maximal power should be of major concern in basketball players training programs to improve their jump performance.