A Comparative Study of Some Biokinematic Variables in the Test of jump from stationary position according to the level of achievement

The research aims at : 1- Finding out the Values of the Biokinematic Variables in the Test of jump from stationary position forward to the measure the explosive power of lower limbs . 2- Finding out the differences in the Values of Some Biokinematic Variables between one the highest attempt and the lowest . The study was conducted on 31 fourth year students / Physical Education College / academic year 2011-2012. both researchers used the technical scientific observation (Video Camera ) to collect data , The highest and lowest attempts were analyzed using (MaxTRAQ) program. The data were statistically treated by using mathematical mean, standard deviation and (T) test. The researchers concluded the following : 1- The number of significant differences achieved in momentary Biokinematic variables was (7) out of (21) significant ones , Then, the percentage was about 33,33 % . The number of significant differences from stage to another stage was (5) out of (15) .Then , the percentage was also 33,33% . 2- The momentary Biokinematic Variable (The angle of the knee) has a remarkable effect in the significant differences achieved in the stage Biokinematic variables and on the differences between the highest and the lowest attempts .