Early studies of structural adaptations of vertebrate bodies regarding to comparative movement biomechanics among fishes (Gray, 1957, a), horses (Hildebrand, 1960, b), birds (Storer, 1952, c) and humans (Napier, 1967, d) revealed the main skeletomuscular structural and functional differences of the investigated biological systems. Therefore it is interesting that up until recent years few studies have been published about the effect of the integrated function of the neuromuscular and skeletomuscular systems on the performed skill (Cordier et al.,1994; Mitra et al., 1997) From one hand this fact is understandable because to investigate such a complex entity and its interaction with the performed skill parametric and nonparametric statistical procedures give limited possibilities to answer particular research hypotheses. The author of this study intended to find a method with the help of entropy classification that would allow researchers, rehabilitators, and neurologists to assess the level of the performed movement based on strictly continuous kinematic variables. Hr: There will be a relation between skill dependent total body system entropy and sport branch specific success. Fifteen highly trained professional athletes participated in the study. Their mean age, weight and height were (M±1SD)24.2 ± 4years,83.1 ± 8.6kg,186.5±5.2cm, respectively. Each subject was Olympic or World Champion assuring that the performed skill is very high in quality. An Ariel Performance Analysis System (APAS) was used to record and to digitize the co-ordinate values for eighteen body points (Dempster, 1955) at a nominal 60 Hz sampling rate. Whole body and segmental entropy values were calculated from displacement data that were correlated to a rank order that described lifetime sport branch specific success among the subjects. Results of Kendall Tau correlations indicated significant relation (Kendall`s t = 0.9)betweenH(A)andSuccessRankOrderatap < 0.05. In accordance to this result, the following conclusion can be drawn: In case of sport specific skills executed by worldclass athletes the total entropy value of the movement system defined by the sum of 64 displacement entropies is a 90% probability indicator (predictor) of the sport success (as criterion) calculated as detailed the above. In general the result allows the author to underline the fact that movement entropy could be a very useful tool for practitioners to objectively assess movement development and condition.
© Copyright 2007 12th Annual Congress of the European College of Sport Science, Jyväskylä, Finland - July 11-14th 2007. Alle Rechte vorbehalten. / Übersetzt mit https://www.DeepL.com/Translator