Kinesiology, Vol. 16. No. 2., 1984.
Original scientific paper
An evaluation of the mathematical model of the human body and its application in predicting the segmental parametres and features of the body
Mladen Mejovšek
; Fakultet za Fizičku kulturu Sveučilišta u Zagrebu
Abstract
The research was completed as one of the number of possibilities for evaluation of anthropomorphic models with the aim to validate the model by testing the reliability of prediction of segmental parameters and features. The aim was defined by the these hypothesis:
- it is possible to construct a model of the human boy which can reproduce the total body mass within the limits of ± 0.5 kg;
- a significant difference is assumed fro symmetrical segments of the left and right side of the body.
For this purpose a 15-segment model was constructed, adapted for use of various regression equations for weight distribution, whose segments are models through the usual stereometric procedures.
It was possible to form the segments of the model on the basis of a group of 49 anthropometric measures, 19 of which were taken on both sides of the body in order to test the differences in measurement and parameters of segments. Each measure was taken three times on after another, on a sample of 68 students of the Faculty for Physical Culture, University of Zagreb.
The analysis of the obtained results indicates a satisfactory level of prediction of segmental massess, density and volume. It also indicates that there are signifcant differences as to the symmetry of the body and the model. namely, the analysis of, the differences undoubtedly confirms the hypothesis about the difference of the left and right side, both in measures of the body and on the parameters of the segments of the model.
Distribution of mass by segments as defined by Bartes regression procedure (average erros 1.118 kg) is on the average less predictive than Clouser's (average erros 0.38 kg) eventhough it must not beoverlooked that Barter's procedure is consistent within the whole range of distribution, while Clouser's procedure tends to overestimate the mass of the heavier and underestimate the mass of the lighter subjects.
The utilized model is, with respect to design of the segments, relatively modest but, on the other hand, it ensures a simple and quick collection of input variables which is definitely an advantage in laboratory application. The model is with smaller adaptations, capable of forming segments of more complex shape if the research requires a greater congruence with the shapes of the body.
With good assessment of segmental masses, densities and volumes on the basis of calculated parameteres, the model may be considered a satisfactory instrument in biomechanic and other kinesiological research.
Keywords
anthropometric characteristics; body dimensions; body parts; mathematical model; regressiona anlysis; physical education students; testing
Hrčak ID:
255687
URI
Publication date:
4.4.1984.
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