Q4E Case Study 22 – Triple Jump: Using Quintic Biomechanics to Calculate Centre of Mass,
Vertical and Horizontal Velocity during Triple Jump
Dr Paul Brice, Senior Biomechanist, UK: Athletics,
Proposed Subject usage:
The goal of in the triple jump is to jump the longest distance combining all three phases. Therefore the single most important AIM is for the athlete to maintain the highest possible horizontal speed, throughout the Hop, the Step and the Jump.
Triple Jump Technical Breakdown
Just before the athlete completes the hop phase, the arms should be pulled back to prepare the athlete for his/her step phase. The step phase is accomplished by bringing the swing leg (opposite of the hop leg) up and forward. The jumper should strive to get the upper leg perpendicular to the body or parallel to the ground about 90 degree. Both arms must come forward to utilize the double- arm action. Whenever the single-arm action is being used during the step phase, the opposite arm goes forward like a continuation of the run.
To execute the proper step phase the jumper should hold his/her leg at 90 degrees for a split second, then the lower leg must extend ahead of the knee just before landing. The requirement for holding this position is to keep the torso extended and slightly forward in order to hole the foot at 90 degree. As the jumper prepares for touchdown and the foot is extended for touchdown, the jumper must extend his/her hand behind the back to prepare for the jump phase. The jumpers arm must be slightly ahead of the free leg to execute the correct jump phase.