engleski

The relation between the kinematic paramtres of running at maximum speed and the 50 metres running results

The aim of this research is to determine the relation between the kinematic parameters of running at maximum speed and the 50 metres running results for children of a younger school age, as well as between girls and boys. The sample of examinees is made of 150 male and female pupils from the first and second form of a primary school in Pula (70 male and 80 female pupils). The average male pupils' age is 8.12±0.63, their height is 133.56±7.66 centimetres, and their body mass is 31.42±8.05 kilogrammes. The average female pupils' age is 8.08±0.61, their height is 132.05±6.44 centimetres, and their body mass is 29.91±7.25 kilogrammes. The sample of variables is made of variables used for determining the kinematic parameters of the sprinter's running in the phase of the maximum speed (the frequency of steps, the length of steps, the duration of the contact and the flight) and the 50 metre running time. The kinematic parameters of the sprinter's running in the phase of maximum speed have been collected by applying the Opto jump technology which was set on the segment between the 15th and the 35th metre, on a length of 20 metres. The 50 metre running time has been measured by the system for electronic measuring. For further data processing the multiple regression analysis and the univariate analysis of the variance have been used. The results obtained in this research show that the variable length of steps has a statistically significant negative impact on the 50 metre running time for girls and boys of younger school age. Since running time is an inversely scaled variable, it means that boys and girls who achieve a better 50 metre running time have, on average, longer steps in 50 metre running. It can be concluded, based on the obtained results, that length of steps is a parameter which has the key role in 50 metre running with girls and boys of younger school age. The analysis between boys and girls determined that boys achieve a better time in 50 metre running and a higher frequency of steps, have a shorter duration of the contact of the foot with the ground and a shorter duration of the flight phase, which confirms the knowledge obtained in previous researches about the relations of kinematic parameters on sprinter's running time and speed.

sprinter's running ; kinematic parameters ; maximal speed ; children

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