Kinematic chains in ski jumping in-run posture
concept of kinematic chains has been systematically applied to biological systems since the 1950s. The course of a ski jump can be characterized as a change between closed and open kinematic chains. The purpose of this study was to determine a relationship between adjacent segments within the ski jumper`s body`s kinematic chain during the in-run phase of the ski jump. The in-run positions of 267 elite male ski jumpers who participated in the FIS World Cup events in Innsbruck, Austria, between 1992 and 2001 were analyzed (656 jumps). Two-dimensional (2-D) kinematic data were collected from the bodies of the subjects. Relationships between adjacent segments of the kinematic chain in the ski jumper`s body at the in-run position are greater nearer the chain`s ground contact. The coefficient of determination between the ankle and knee joint angles is 0.67. Changes in the segments` positions in the kinematic chain of the ski jumper`s body are stable during longitudinal assessment. Changes in shank and thigh positions, in the sense of increase or decrease, are the same.
© Copyright 2013 Journal of Human Kinetics. Kaikki oikeudet pidätetään.
Aiheet: | mäkihyppy huippu-urheilu huippu-urheilu kilpailu asento tekniikka analyysi biomekaniikka tutkimusmenetelmä video |
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Aihealueet: | tekniset ja luonnontieteet urheilukilpailut |
DOI: | 10.2478/hukin-2013-0069 |
Julkaisussa: | Journal of Human Kinetics |
Julkaistu: |
2013
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Vuosikerta: | 39 |
Numero: | 1 |
Sivuja: | 67-73 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |