B33 A study on the starting techniques at the clearance from blocks on crouch start

Abstract

In the sprint, the sprinters are required to use starting blocks at the crouch start. Therefore, it is important to clarify the technique of block clearance in order to improve sprint performance. The purpose of this study is to examine the technique of block clearance from joint torque and joint power in lower extremity applied to the starting blocks by sprinters. From starting blocks, six sprinters did the "starting dash" as is done in a sprint running race, and the forces applied to the right and left starting block were measured by with the force plates (1kHz). And, the block clearance movement was recorded by Hi-speed camera (250Hz). The results can be summarized as follows. There were two different patterns about the joint torque and power applied to the rear block. The type of pushing the rear block was presumed to have exhibited the extension torque and power at the hip and ankle of the rear leg. On the other hand, the type of pulling the rear leg from the rear block was presumed to have exhibited the flexion torque at the hip and the extension torque and power at the knee and ankle of the rear leg.