EFFICIENCY EVALUATION METHOD FOR PUNCH STRIKES IN COMBAT SPORTS BASED ON CINEMATIC PARAMETERS
EFFICIENCY EVALUATION METHOD FOR PUNCH STRIKES IN COMBAT SPORTS BASED ON CINEMATIC PARAMETERS

Summary/Abstract: For analyzing, evaluating and comparing striking techniques used in combat sports it is necessary a close acquaintance ship because is useful to take into account the most relevant aspects of every studied technique. We propose an evaluating method of punch strikes based on objective measurements and analyzing of the determinant cinematic parameters for the efficiency of any strike. We made data aquisition regarding the position of the body segments in the three orthogonal planes using MOVEN Xsens equipment on four subjects on different weight categories, multiple kick box national champions. The data have been adapted for a biomechanical analysis of the studied technique, accurately estabilishing the temporal frames of the sequences that constitute the technique itself. For the chosen sequence (from the beginning of the elbow extension to fist impact with the target) we calculate the average speed of the fist, the fist’s impact acceleration (as a proportionality factor of striking force), the difference between the hips and shoulders lines and the upper speed of the fist. Related with the balance of the cinematic parameters in the efficiency of the strike, we quoted with 10, 9, 8 and 7 points the values placed on the upper limit of the scale and with lower quote, appropriate with the described values range. In this manner we evaluated all the strikes applied by each subject and we calculated the average score for each other. On the other side, we build a strike for each subject starting from the medium values of the parameters individually computed. We evaluated these modellated strikes, too using the scale described above and the score was close (differences lower than 5%) to the average score of the strikes for each subject. This is a confirmation of the fact that our evaluation scale is an objective one, the values ranges corresponding for each score being rationally established. A major plus of this scale is that is so designed to be not dependent of subject’s weight category.

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