期刊名称：Facta Universitatis : Series Physical Education and Sport
印刷版ISSN：1451-740X
出版年度：2010
卷号：8
期号：01
出版社：University of Niš
摘要：One leg vertical jump is designed to assess functional performance of lower extremity in both health and injured athletes, but there is a preoccupation in the literature to use vertical two-legs jump as measures of leg power, for the purpose of athlete assessment, performance monitoring, talent identification and in some instances prediction of readiness for training or recovery from rehabilitation. The main aim of this research was to quantify and compare the variables of manifested explosive strength, determined by different protocols of Countermovement Jump (CMJ), i.e., to determine lower extremities difference in relation to explosive strength. The sample of subjects consisted of 19 healthy, male students of the Faculty of sport and physical education from Niš, engaged in different sport activities, age 23.16±1.26 years, body height 181.37±6.51 cm and body weight 81.74±8.37 kg (Mean±Std.Dev). Subjects performed five Countermovement Jumps (CMJ), by using three different protocols of maximum vertical displacement: 1) with a left take off leg; 2) with a right take off leg; 3) with both take off legs. Wireless accelerometer «Myotest» (Sion, Switzerland), measured following variables of CMJ: Height (expressed in cm); Power (expressed in W/kg); Force (expressed in N/kg) and Velocity (expressed in cm/s). The results of descriptive statistics showed that the highest values among all variables were obtained after the CMJ protocol performed with two legs. The results of ANOVA test for repeated measurements did not show statistically significant differences between analyzed variables in CMJ with left leg protocol and CMJ with right leg protocol. However, the values obtained after the CMJ protocol with two-legs were significantly higher, in relation to both one-leg jump protocols. Derived data on the muscles' explosive strength of subjects, may help them in improving their physical abilities. Obtained results can also encourage physicians and their patients (e.g. injured athletes), to apply one-leg vertical jumping in rehabilitation process, i.e., to estimate necessary explosive strength of injured lower extremity, by assessing the healthy one and achieve the regular and balanced body look.
关键词：Explosive strength, vertical jumping, CMJ one leg-two legs protocols, difference
