THE EFFECT OF RUN·UP DISTA CE AND SOME KINEMATICS VARIABLES ON LONG JUMP DISTANCE FOR THE PRIMARY STAGE ATHLETE STUDENTS IN AL-TAFILAH DISTRICT

Abstract

The purpose of this study were to investigate the best Run-up length contributin to Long Jump distance, and to investigate the relationship between the Run-up and the klnematics' variables for which a regression formula was established to predict jumping performance that can be used for athletes selections. (80) Long Jumping students were served as a subject in this stUdy in whicf1 best 11 athletes ages range "13·15" had been assIgned 3 trials In six Run-ups lengths and these were randomly ordered to each subject (10, 15, 20, 25, 30, 35, and 40 m). The kinematics' variables were calculated at the center of gravity of the body and they were take off angle (TOA), take off velocity(TOV), horizontal lake off veJocity(HTV), vertical take off ve ocity(VTV), take off height(TOH) and Run-up velocity RUV). Results showed that (20) meters Run-up length was the best for the SUbject in the study and that the relationship between the horizontal take off velocity and the jump distance was strong and proporti nal. A proVisional prediction formula was established and it was suggested to adopt shorter run-up length for the primary students in Jordan to acf1lave better klnematical relation.