4007323

Biokinematische und biodynamische Analyse der V-Technik im Skispringen

(Biokinematic and biodynamic analysis of the V-technique in skijumping)

The purpose of this paper is the analysis of the V-technique in ski- jumping from the biomechanical point of view on the basis of previous investigations. 22 ski-jumps of eight members of the Austrian National- Team were measured and analyzed using kinematic and dynamic methods. The take-off and the first 20 m of the flight-phase were filmed with two panned and tilted video cameras (50 Hz). A special software was used to obtain three-dimensional kinematic data. The description of the movement in this area was realized by parameters of distances, velocities, angles and angle velocities. For dynamic measurement of the movement from the in- run to the landing two EMED-insoles (40 Hz) with 85 capacitive sensors each were used. The forces, the centers of pressure and the percentages of the forces in defined parts of the foot were chosen for descriptions and analyses. These measurements were added by the calculation of the angular momenta and the forces in the knee-joint during the take-off phase. According to all parameters a high level of automation could be recorded. The interindividual as well as the lateral differences were partly high. Using statistical methods it could be shown that the optimal combination of high vertical take-off velocity, big rotation impulse at take-off and a small angle between body and skies 20 m after the take-off caused long jumping distances. Significant differences between the A- and B-team were recorded for the relative forces and the angular momenta during the take-off phase. In the last part the perspectives for further investigations are reported.
© Copyright 1994 All rights reserved.

Bibliographic Details
Subjects:
Notations:strength and speed sports technical and natural sciences
Language:German
Published: 1994
Online Access:http://www.fodok.at/fodokat/details?fodok_id=222548
Document types:dissertation
Level:advanced