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2011 | 27 | 5-16
Article title

Kinematic Analysis of the Take-Off and Start of the Early Flight Phase on a Large Hill (HS-134 m) during the 2009 Nordic World Ski Championships

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EN
Abstracts
EN
The take-off is often considered the most significant and difficult phase of a ski jump. Thus, the purpose of this study was to compare three groups of ski jumpers representing different skill levels during the execution of the take-off and start of the early flight phase in ski jumping. A total of 30 athletes, recruited from competitors performing ski jumps on an HS-134 m jumping hill, were categorized into three groups based on jump-length execution. Two-dimensional (2-D) kinematic data were collected from the lower extremities, trunk, and skis of the ski jumpers. Findings indicated that the ski jumpers with shorter jump length demonstrated significantly smaller in-run velocity (p < .05), while the elite and mediocre level ski jumpers exhibited a significantly faster shift of the thigh at the transition from take-off into the early flight of the jump (p < .05) than did the low-level ski jumpers. In addition, the centre of body mass (CoM) of the elite group shifted significantly more forward over the skis (p < .01) than did that of the other two groups. Finally, interindividual differences existed among ski jumpers at similar performance levels. The largest coefficients of variation (CVs) were found for the position changes of the trunk and shank behind the jumping hill edge.
Publisher

Year
Volume
27
Pages
5-16
Physical description
Dates
published
1 - 3 - 2011
online
6 - 4 - 2011
Contributors
  • Department of Biomechanics and Engineering Cybernetics, Faculty of Physical Culture, Palacký University, Olomouc, Czech Republic
author
  • Department of Graduate Programs in Health Sciences, School of Health and Medical Sciences, Seton Hall University, N. J., U.S.A.
  • Department of Biomechanics and Engineering Cybernetics, Faculty of Physical Culture, Palacký University, Olomouc, Czech Republic
author
  • Department of Biomechanics and Engineering Cybernetics, Faculty of Physical Culture, Palacký University, Olomouc, Czech Republic
  • Sport Research Centre, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_v10078-011-0001-5
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