Kineziologija, Vol. 18. No. 2., 1986.
Izvorni znanstveni članak
Some possibilities for improvement of the biomechanical model of the human body
Leo Pavičić
; Fakultet za fizičku kulturu Sveučilišta u Zagrebu
Mladen Mejovšek
; Fakultet za fizičku kulturu Sveučilišta u Zagrebu
Sažetak
The analysis was carried put on a sample of 121 students at the faculty of Physical Culture in Zagreb, aged 20 to 26. The subjects had no acute malformations of the body at the time the measurements of the body at the time the measurements were taken. Two groups of anthropometric measures were used. The first group was intended to calculate the parameters and form the segments of the biomechanical model, whereas the second had to establish the latent anthropometric dimensions of the body.
The results were determined on the basis of the first major component of measures, rescaled into the anti-image metrics. Each system of variables was subjected to component analysis using GK criterion for space dimensionality particularly between the systems of latent dimensions, were assessed by means of the orthoblique procedure. Relations between measuring systems, and particularly between the systems of latent dimensions, were assessed by means of the canonic correlation analysis.
The results of the analysis in the space of 16 anthropometric measures have shown agreement with the results up to (M), transversal dimensionality of the skeleton (T) and circular dimensionality of the body (C).
The second studied space was determined by means of the biomechanical measures of the human body that were constructed with the purpose to calculate the volume of the segments of the biomechanical model. The measures analyzed in the study were derived from the original measures, established directly on the subjects and derived from linear-type procedures. The segment density was obtained on the basis of the calculated volumes and weights that were established by the procedure designed by Clauser et al. (1969):
Eight isolated factors were interpreted as follows:
1. factor involving trunk and its belonging (TZ).
2. topological factor of the trunk (TT).
3. longitudinality (LE).
4. topological factor of the foot (TS).
5. topological factor of the head (TG).
6. topological factor of the thigh (TN).
7. transversality (TrS).
8. topological factor of the fist (TSa).
Canonic relations between the systems of manifest variables have yielded eight significant pairs of canonic factors, but only first three have been interpreted due to low coefficients of determination in the remaining pairs.
The first canonic factor in the space of anthropometric measures was interpreted as skeleton factor, while its pair in the parameter space determined by all measures of segment length, by measures of a smaller radii of extremities and by measures of density with opposite sign, as longitudinal and transversal dimensionality of segments of extremities.
The second canonic factor in the space of anthropometric measures was interpreted as the total mass of the body. In the parameter space the second canonic factor was determined by the greater and smaller radii of the extremities pointing to its similarity with the circular dimensionality of the body.
The third pair of canonic factors seems to have been determined by the specific composition and form of the trunk segment.
Canonic relations in the latent space, although determined by the first three pairs of significant canonic factors, are practically exhausted in the first pair. The first canonic factor in the anthropometric space is defined by the longitudinal and circular and, somewhat less, by the transversal dimensionality. In the parameter space this factor is determined by parameters that are measure of the corresponding features of the human body.
The high correlation between the two spaces was to expected, bearing in mind that essentially a single object is involved and described in two different ways, for two different purposes. This correlation, as may be seen from the first two pairs of canonic factors in the manifest and the first factor in the latent space, is exhausted through the latent features of longitudinality, circularity and transversality of the human body. Having explained these correlations, a poor and practically negligible correlation is evident between the subcutaneus fat tissue and the segment density.
Ključne riječi
Hrčak ID:
253406
URI
Datum izdavanja:
14.1.1986.
Posjeta: 653 *