THE HIERARCHICAL STRUCTURE OF SELECTED MORPHOLOGICAL AND MOTORIC VARIABLES IN SKI JUMPING
Journal Title: Human Movement - Year 2010, Vol 11, Issue 2
Abstract
Purpose. The main purpose of the present research paper was to establish a hierarchical factor structure in a selected sample of morphological and motor variables of ski jumpers; such variables are base constituents of the potential performance model in ski jumping. Basic procedures.[b] [/b]The subject sample was Slovene ski jumpers older than 15 years ([i]n[/i] = 72), tested in May 2008. The research was done on a selection of 41 variables (12 basic morphological ones, seven from a special morphological index, 10 basic motoric ones and 12 special dynamic variables of take-off power). Main findings. Through factor analysis in the first phase, nine factors were excluded from the manifest variables of first orders: 1. Factor of velocity power (34.9% of variance); 2. Factor of longitudinal body dimensions (17.2% of variance); 3. Factor of morphological index of flight aerodynamics (12.2% of variance); 4. Factor of morphological index of take-off (7.3% of variance), 5. Factor of push-off explosive power (5.0% of variance), 6. Factor of informatic component of motorics (3.5% of variance); 7. Factor of specific morphological index of thigh dimensions (3.1% of variance), 8. Factor of transversal dimensions of body (2.4% of variance), 9. Factor of flexibility of hips (2.2% of variance). All nine factors of the first order explained 88% of variance of manifest variables. On the basis of configuration of nine factors of the first order in the second phase, four components were excluded from the second order with 62.7% of total variance. The first was component of specific take-off movement (22.9% of variance), followed by component of thigh dimension (14.5% of variance), then component of specific flight potential (13.0% of variance) and finally component of basic morphology (12.1% of variance). On the third level of factor analysis, two general factors of ski jumpers with 57.1% of total variance were found. The first was the general factor of specific movement of ski jumpers (29.8% of variance) and second the general factor of morphology (27.7% of variance).
Authors and Affiliations
Bojan Jost
Keywords
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