The relationship between the kinematic parameters of the block start and the first step speed in female representatives of the Slovak Republic in athletic sprints

Abstract

This article points to the kinematic parameters of the block start in the position "Set" and in the "First step after the shot" between female representatives of the Slovak Republic in athletics. The tested subjects were 22 finalists of the SR Championship for adults, juniors, and teenagers. Nonparametric procedures were selected based on the assessment of the normality of the distribution of the files. We use descriptive statistics to present the parameters. The relationships between the kinematic variables and the first step speed are assessed by Spearman's correlation coefficient " rs ". The non-parametric algorithm CHAID-Chi-squared Automatic Interaction Detector and Trees was used for the construction of decision trees. This technique can be used to predict, classify and detect interactions between variables. We present the regression parameters for the models. The results were processed in MS Excel and IBM SPSS Modeler. Our findings and conclusions are formulated on the basis of objective and logical evaluation of the obtained results. Using the tree method, kinematic indicators were selected that showed high closeness to the first step speed. The slope of the back block (angle 1), the height of the pelvis (length 5) and the distance of the first block to the starting line (length 1) entered the regression model of women at the attention command to the first step speed. The first step speed after the shot was determined by the distance of the first step from the first block (length 4) and the angle in the knee joint of the front leg (angle 10). The obtained results are closely related to the specificity of the deliberate selection of sets of sprinters, to which their current performance or block start technical level. Since these are representatives of the Slovak Republic, the obtained results can be used as a guideline for the technical improvement of the block start of other athletes.