COMPARISON OF VERTICAL JUMP PERFORMANCE BETWEEN FEMALE THAI NATIONAL AND YOUTH NATIONAL VOLLEYBALL PLAYERS

Abstract

Volleyball depends heavily on jumps including hitting and blocking. Thus, Jump performance test is of importance. Most volleyball researches in Thailand are commonly reported jump eight but data related to rate of force development (RFD) are limited particularly in the youth female volleyball players. Therefore, the purpose of this study is to investigate Jump performance of Thai national (NG) and youth national volleyball players (YG) and to compare the performance between the legs. Elven Thai national volleyball and ten youth national volleyball players were performed 2 jump tests: squat jump (SJ) and countermovement jump (CMJ). Force plates were used to collect data at the sampling frequency of 1000 Hz. Man Whitney U revealed only right power of NG is significant higher than YG in both SJ and CMJ. Wilcoxan sign rank test did not show any significant differences between two legs. However, NG shows greater jump performance than YG. RFDs in both groups show similar values but NG has greater power. This may indicate that YG should be emphasized in improvement of velocity in order to increase power