engleski

Influence of some kinematic parameters to the pole vault results

The basic goal of this research is to determine the relation between 12 kinematics parameters (prediction group) and results affirmation (reached height) in pole vault. We will try to determine deviations of kinematics parameters values in the initial and final measurements. Measurements have been conducted in identical conditions (the lenght of approach, grip to the pole, firmness of the pole, number of jumps) and in the interval of 7 months. Both measurements have been conducted through 3 practise competitions (every 5 days)in which the examinee has made 24 jumps. Pause between jumps was 5 to 7 minutes, lenght of the approach 12 running steps, pole grip 4, 10 ; firmness 18.5. Measurement has been made on one examenee, Croatian junior representative (18 years old male, 181 cm tall, 72 kg).The results have been collected using 3 cameras (50 Hz ; 1/1000 sec) and analysed with APAS system and statistics 7.0. Digitalisation, 3D transformation, filtration of data, calculation of kinematics parameters, descriptive statistics and regression analysis have all been made/calculated. Accomplished values of kinematics parameters in the final measurement differ from the values accomplished in the initial measurement. In both cases the results of regression analysis indicated thet there is a significant multiple connection between prediction variables and resultinf efficacy in pole vault which can be refered to the level of advancement in technique. Both in the first measurement (Zagorac and ass, 2008) and in the second measurement, only one parameter appeared as a relevant index of efficacy in pole vault (M% - maximum bending of the pole). It can be concluded that relations between predictions and criteria remained the same in both cases. A higher result efficacy has been accomplished in the second measurement due to the better over-all preparation of the jumper and appropriate technical embracement of parts of the jump as well as the whole pole vault technique. Considering that there is a limit for maximum result achievement in this discipline, it is recommended that these case studies are repeated with altered characteristics when registrating parameters of the jump (higher pole, increased firmness, higher grip, longer approach).

athletics ; case study ; polevault ; kinematics prametres

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