Kinematic Chains in Ski Jumping In-run Posture

• Authors: Eva Janurová , Miroslav Janura , Lee Cabell , Zdeněk Svoboda , Ivan Vařeka , Milan Elfmark
• Languages of publication: EN

Abstracts

EN

The 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.

Keywords

EN

2-D videography; biomechanics; ski jumping; kinematic chains

• Publisher: De Gruyter Open
• Journal: Journal of Human Kinetics
• Year: 2013
• Volume: 39
• Issue: 1
• Pages: 67-73

Dates

published

1 - 12 - 2013

online

31 - 12 - 2013

Contributors

author

Eva Janurová

• Institute of Physics, Faculty of Mining and Geology, Technical University of Ostrava, Czech Republic.

author

Miroslav Janura

• Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacky University, Olomouc, Czech Republic.

author

Lee Cabell

• Department of Graduate Programs in Health Sciences, School of Graduate Medical Education, Seton Hall University, South Orange, New Jersey, U.S.A.

author

Zdeněk Svoboda

• Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacky University, Olomouc, Czech Republic.

author

Ivan Vařeka

• Department of Physiotherapy, Faculty of Physical Culture, Palacky University, Olomouc, Czech Republic.

author

Milan Elfmark

• Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacky University, Olomouc, Czech Republic.

References

• Dempster WT. The space requirements of the seated operator [Technical Report No. WADC-TR-55-159]. Dayton, OH: Wright Patterson Air Force Base; 1955
• Di Fabio RP. Making jargon from kinetic and kinematic chains. J Orthop Sports Phys Ther, 1999; 29(3): 142-143
• Dželalija M, Rausavljevič N, Jošt B. Relationship between jump length and the position angle in ski jumping. Kinesiol Slov, 2003; 9(1): 70-79
• Escamilla RF, Fleisig GS, Zheng N, Barrentine SW, Wilk KE, Andrews JR. Biomechanics of the knee during closed kinetic chain and open kinetic chain exercises. Med Sci Sports Exerc, 1998; 30(4): 556-569[Crossref][PubMed]
• Ettema GJC, Bråten S, Bobbert MF. Dynamics of the in-run in ski jumping: A simulation study. J Appl Biomech, 2005; 21(3): 247-259[PubMed]
• Graham VL, Gehisen GM, Edwards JA. Electromyographic evaluation of closed and open kinetic chain knee rehabilitation exercises. J Athl Training, 1993; 28(1): 23-30
• Hudson JL. Coordination of segments in the vertical jump. Med Sci Sports Exerc, 1986; 18(2): 242-251[PubMed][WoS]
• Janura M, Cabell L, Elfmark M, Vaverka F. Kinematic characteristics of the ski jump inrun: A 10-year longitudinal study. J Appl Biomech, 2010; 26(2): 196-204
• Janura M, Svoboda Z, Uhlář R. A comparison of ski jump execution in a group of the best jumpers. In: V Linnamo, PV Komi and E Müller editors. Science and Nordic Skiing. Oxford: Meyer & Meyer Sport Ltd., 205-214; 2007
• Janura M, Vaverka F. Evaluation of the video analysis system I. (Precision of the analyzed data). Tel vých šport, 1997; 7(3): 28-31
• Müller W. The physics of ski jumping. In: R Fleischer editor. Proceedings of European School of High-EnergyPhysics. Geneva: CERN, 269-278; 2005
• Reuleaux F. Theoretical kinematics - outline of a theory of machines. Braunschweig: Von Fridrich Vieweg und Sohn; 1875
• Sasaki T, Tsunoda K, Uchida E. The effect of segment power in ski jumping. In: Proceedings of the 14thCongress of the International Society of Biomechanics in Sports Paris: ISBS, 1186-1187; 1993
• Schwameder H, Müller E, Raschner C, Brunner F. Aspects of technique-specific strength training in ski jumping. In: E Müller, H Schwameder, E Kornexl and C. Raschner editors. Science and Skiing. London: E & FN Spon, 309-319; 1997
• Steindler A. Kinesiology of the human body under normal and pathological conditions. Springfield: Charles C Thomas Publisher; 1955
• Steindler A. Kinesiology of the human body under normal and pathological conditions. Springfield: Charles C Thomas Publisher; 1977
• Stepien A, Bober T, Zawadzki J. The kinematics of trunk and upper extremities in one-handed and twohanded backhand stroke. J Hum Kinet, 2011; 30(1): 37-47[PubMed]
• Sundaresan A, RoyChowdhury A, Chellappa R. 3D modelling of human motion using kinematic chains and multiple cameras for tracking. In: Proceedings of the 8th International Symposium on the 3-D Analysis ofHuman Movement. Tampa, FL: University of South Florida; 2004
• Tsarouchas E. Optimization of the kinematic chain in human movement as it relates to training. In: J Terauds and JN Barham editors. Proceeding of the 3rd International Symposium on Biomechanics in Sports. Greeley, CO: University of Northern Colorado, 31-49; 1985
• Vaverka F. Biomechanics of ski jumping. Olomouc: Palacky University; 1987
• Vaverka F, Elfmark M, Janura M, Kršková M. The system of kinematic analysis of ski-jumping. In: A Barabás and G Fabián editors. Proceedings of the 12th International Symposium on Biomechanics in Sports. Budapest: Hungarian University of Physical Education, 285-287; 1994
• Virmavirta M, Isolehto J, Komi P, Brüggemann GP, Müller E, Schwameder H. Characteristics of the early flight phase in the Olympic ski jumping competition. J Biomech, 2005; 38(11): 2157-2163[PubMed][Crossref]
• Virmavirta M, Komi PV. Plantar pressure and EMG activity of simulated and actual ski jumping take-off. Scand J Med Sci Sports, 2001; 11(5): 310-314[PubMed][Crossref]
• Vodičar J, Čoh M, Jošt B. The kinematics of trunk and upper extremities in one-handed and two-handed backhand stroke. J Hum Kinet, 2012; 35(1): 35-45
• Zanevskyy I, Banakh V. Dependence of ski jump length on the skier's body pose at the beginning of take-off. Acta of Bioengineering and Biomechanics, 2010; 12(4): 79-87
• Zatsiorsky VM. Kinematics of human motion. Champaign, IL: Human Kinetics; 1997
• Zhang X. Biomechanical realism versus algorithmic efficiency: a trade-off in human motion simulation and modeling. SAE Transaction, 2001; 110(6): 2184-2191

Identifiers

DOI

10.2478/hukin-2013-0069