George Bourne Self Analysis coursework 28/1/03
Person analysing: myself. This means that the analysis will be done from video evidence.
Activity: (track and field) the long jump
What will be analysed: The penultimate stride through to the landing (this will be done off a full competition run up).
The technique being analysed:
The air technique used by myself is called the stride or sail, which uses a skid through landing. The penultimate and final stride of the long jump before take off are also included.
The penultimate stride of the long jump
The technique of the penultimate stride is as follows the hips are lowered slightly, and the legs are loaded (bent athletically, not straight or cocked) In the penultimate stride, the body's centre of mass must be lowered in order to attain the optimum position for the take-off. The initial slight sinking or lowering of the hips (pelvic area) is to raise the region (centre of gravity) a stride later at the actual take-off. This can result in the penultimate stride being slightly longer (up to 20cm longer than a normal running stride), but the final stride being up to 25 centimetres shorter than a normal running stride. The final stride of the take-off run typically shortens so that the athlete can create greater muscle tension in the take-off leg and create an increased vertical momentum for take-off. In many cases it happens as a natural response to take-off the athlete keeps a tall body position with no backward lean otherwise much of the hard work and speed generated on the runway is lost, which cause the last stride to be too long. Due to the lengthening of the penultimate stride it automatically reduces the velocity of the takeoff stride, but isn’t very significant. The penultimate foot plant technique used before take off is a rolling contact of the foot similar to the one used at the takeoff foot plant. The penultimate foot placement is not too far in front of the hips, to minimise breaking and deceleration.