How tall are shot putters

Video footage was taken at an indoor competition during the season. The videos were later calibrated in horizontally and vertically by using a calibration grid that was placed in the centre of the shot circle after the competition had concluded. All of the captured clips were then manually digitised, and Butterworth filters were applied to the data, to smooth any errors.

Shot release height was calculated by using the ruler and calibration functions. The vertical distance was measured between the centre of the shot at release, Release defined as the last frame that the shot has in contact with the athletes hand and the surface of the throwing circle. This shows a difference of 12cm. This difference in shot release height could be due to individual technique differences. Although a big factor which effects the release height of the shot, is the actual physical difference in vertical athlete A is actually 13cm taller them B.

Angle of release is important in the shot event as the release speed of the shot decreases when thrown with a higher release angle. The decrease in projection velocity with increasing projection angle is a result of two factors. When throwing with a high projection angle, the athlete must expend a greater effort during the delivery phase to overcome the weight of the shot, and so less effort is available to accelerate the shot i. The structure of the human body favours the production of putting force in the horizontal direction more than in the vertical direction.

The angle of release was calculated by overlaying an angle to the horizontal over the digitisation trace of the shot. Therefore we can see that athlete B is currently just outside this range, although ideally more data would be collected on the athlete, before any assumptions can be made. Linear shot velocity as well as, the horizontal and vertical components were calculated by digitising the shot. In addition in the same timespan analysed twice as many World Championships have occurred than Olympics.

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