On The Quantitative Evaluation Of Sports Mastershaft
Resumo
Introduction
One of the main tasks of sports biomechanics is to achieve quantitative evaluation of sports mastershaft. The principal difficulty of the analysis comes out of the objective difference between the inner and outer force fields of the athlete’s motor system. In addition "outer" characteristics evaluated experimentally do not necessarily carry information on the potential and compensatory abilities of the "inner" biomechanical structure.
Methods
We realized an active experiment in judo aiming at quantitative evaluation of biomechanical significance of inner structure. Standardization of outer force filed has been achieved through specifically designed active dummy. Force reactions have been carried out in pursuance of The Law of Random Numbers in each and every test and into specific critical locations of the dynamographics of the attack.
Discussion/Conclusions
The success of the through technique depends mostly of the horizontal force in the direction of the through. In this respect critical are points A and B of the dynamogram. The force vector against "Uke" reaction proves the existence of significant potential possibilities for compensation of external influences.
Unexpected results cam be observed at the three local extremes (points A,B,C). As a difference of the supercompensation in the local minimums (points A and B) comparatively non significant external influence in the local maximum (point C) leads to destroying of the whole system.
The externally registered mechanical characteristics usually are not enough informative about the biomechanical expedience of sport movements. The interaction between internal and external force fields has a strongly expressed individual characteristics.
The active biomechanical experiment using adequate external influences can reveal internal potential possibilities for successful movement performance.
References
[1]. Богданов П., Иванов Св. (1985) - Биомеханика на физическите упражнения - МФ София
[2]. Добровски В. И, Федорова В. Н. (2003) - Биомеханика - Владос Прес Москва
[3]. Иванов Св. (1988) - Теория и методика на биомеханичния анализ - НСА София
(Texto completo com gráficos e tabelas no anexo)
