ジュニア男子アスリートを対象としたRebound Long Jump Testと疾走および水平跳躍能力との関係ジュニア男子アスリートを対象としたRebound Long Jump Testと疾走および水平跳躍能力との関係AA1191547X The Relationship Between Rebound Long Jump Test and Performance of sprint and horizontal jump events.
The purpose of this study is to examine the optimal measurement condition of Rebound longjump test (RLJ test) and to investigate the relationship between sprinting and horizontaljumping ability. The RLJ test evaluates the ability to perform the ballistic stretch-shorteningcycle movement for a high-speed horizontal jump performed by a single leg by using the RLJindex (RLJ-index (m/s) = Jumping distance (JD(m)) / Contact time (CT(s)). The test iscomposed of two uninterrupted jumps, the falling jump and the propulsive jump. Thetouchdown velocity of the propulsive jump is able to modulate by changing the distance of thefalling jump (DFJ). Eleven male junior-tertiary college track-and-field athletes performed theRLJ test, and the DFJ was set at 1 and 2 m (DFJ1m, DFJ2m, respectively), and jumpingdistance and contact time were measured for both DFJ. Simultaneously, the 60m-sprint andthe ten steps of bounding were conducted. We found that there was a correlation between the RLJ index measured for a DFJ2m and the maximal speed phase of the 60m-sprint and the ten steps of bounding. These results demonstrate the significance of using the RLJ test and RLJ index by using DFJ2m for junior track-and-field athletes to measure the common ability to perform the ballistic stretch-shortening cycle movement in unilateral horizontal jump events.