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Analysis of the performance parameters during pole plant preparation in pole vault based on optical sensors
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Debray_51151600_2021.pdf
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- In pole vaulting, motion capture systems led to new insights on the jump performances. Biomechanical models of the athletes have been created from experiments and allow pose and muscle activity estimation, end a recreation of the energetic system. This thesis uses marker-based 2D motion capture to analyse a very specific part of the pole jump, the impact of the upper arm extension in the last steps before take-off. The measurement system uses 2 cameras placed on the side of the run-up track, that detects coloured markers, placed on the athlete, in the sagittal plane. The marker data is used to reconstruct a 2D model to analyse the technique of the athlete during the pole plant preparation. Performance parameters as take-off foot position, mean horizontal hip velocity per step or horizontal wrist velocity are extracted from the marker data. The performance factor of interest to coaches in our case is the arm extension during pole plant. A quickly stretched upper arm leads to good conditions at take-off and later in the jump. A slow arm stretching can lead to horizontal deceleration in the last step or a take-off foot positioned too close to the planting box, which is called, planting "under" the pole. The goal is to create an outdoors experience without need of lab settings that is still able to give accurate information to the coaches about important pole plant preparation parameters. In most cases, the obtained results showed to give useful insights about the selected performance parameters, which shows the potential of motion capture in this area. From there, a 3D mocap system with higher precision instruments can be constructed to obtain a detailed model of the arm stretch. Hence, specific exercise can be implemented for performance improvements.