Topographic recording of the Slalom racing route in snow
AbstractPurpose: The purpose of the present research was the study and evaluation of the theodolite’s (topographic speedometer) use in tracing a path in slalom racing on snow conditions with 58 gates and also to record the optimal method of tracing a slalom route in relation to: a) the "velocity" of the race track (degree of difficulty of slalom), b) safety of tracing the slalom route. Methods: This research was based on methodology and measurements of a race track in giant slalom with 35 gates in the ski resort "3-5 Pigadia" of Naoussa - Greece. The topographic speedometer was fixed in place at the start of the route. From this point, measurements were taken, for the placement of all 58 gates throughout the route. The measurement was taken using the pole-prism, placed in each interior gate turn, at which the theodolite was aimed. With the help of topographic speedometer the following geometrical parameters have been registered: distance between the gates (Δs), altitude difference of points (Δh) with an accuracy up to 1cm, terrain slope (θ), gate angular deviation (δ) with an accuracy of up to 1 minute of the angle (°). This allows the creation of the top-view, side-view (profile) and three-dimensional aspect of the track, under race conditions on snow and not on dry ground. Results: The correlation coefficient (r) between the geometry factor (V.gs) and average the above geometry parameters had the following respective values: V.gs -Ms = 0,15, V.gs -Mθ = - 0,52, V.gs -Mδ = - 0,29 for 58 gates on a level of statistical significance of p < 0,05. Conclusions: The first part comprised of 10 gates was the "fastest" (V.gs = 18 degrees) of the total slalom route in Naoussa with 58 gates (V.gs = 14 degrees). With the above criteria, slaloms will be compared to each other and will be evaluated against age and safety.
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FIS. Memorandum for the Technical Delegate. Oberhofen, Switzerland: International Ski Federation; 2005.
Cotelli F, Cotelli M. Sci competizione. La tecnica delle tre discipline: slalom, gigante e discesa. [Ski competition. The technique of the three disciplines: slalom, giant and descent]. Milan: Longanesi R.C.; 1981. (In Italian)
Nachbauer W. Lienienführung und Druckverlauf bei Torlauf und Riesentorlauf. [Leading line and course of pressure in slalom and giant slalom]. AUSTRIA SKI, 1985;4(85):34-35. (In German)
Nachbauer W. Fahrlinie in Torlauf und Reisentorlauf. [Course line in slalom and giant slalom]. Leistungs sport, 1987; 17(6):17-21. (In German)
Erdmann WS, Giovanis V. Preliminary investigations of kinematics of a skier in giant slalom (in Polish). In: Mazurkiewicz S (ed.) Proceedings. All Polish Conference of Biomechanics. Krakow: B. Czech University, School of Physical Education; 1995. P. 57-62.
Giovanis V. Kinematics of slalom courses’ runs in alpine skiing and problem of injuries. PhD [dissertation]. Cracow: University of Physical Education; 1998. (in Polish).
Henning E. Improvement of GPS accuracy for the tracking of human motion by the elimination of “Selective Availability” restrictions. In: Gerber H, Müller R(ed). International Society of Biomechanics XVIIIth Congress. Zurich; Swiss Federal Institute of Technology; 2001. P. S10.
Aschenbrenner P. Kinematics of competitors’ running on the course of alpine skiing giant slalom and its geometric parameters PhD [dissertation]. J. Sniadecki University of Physical Education, Gdansk; 2002. (in Polish).
Brodie Μ, Walmsley Α, Page W. Force vector analysis of ski racing technique using fusion motion capture. In: Menzel H-J, Chagas MH (ed) 25th International Symposium on Biomechanics in Sports. Proceedings. Ouro Preto, MG, Federal University of Minas Gerais, Belo Horizonte, MG; 2007. P. 71-74.
Brodie M, Walmsley A, Page W. Fusion motion capture: a prototype system using inertial measurement units and GPS for the biomechanical analysis of ski racing. Sports Technol. 2008, 1:1:17-28.
Hasler M, Abwerzger G, Hofmann-Wellenhof B, Nachbauer W. A kinematic carrier phase GPS for biomechanical analyses. In:Schena F (ed). Book of Abstracts of the 2nd International Congress “Mountain, Sport & Health”. Rovereto; Interuniversity Research Center in Bioengineering and Motor Science; 2007. P 41.
Seifriz F, Mester J, Krämer A, Roth R.The use of GPS for continuous measurement of kinematic data and for the validation of a model in alpine skiing. International Journal of Computer Science in Sport, 2009;1:62-63.
Skaloud J, Limpach P. Synergy of CP-DGPS, Accelerometry and Magnetic Sensors for Precise Trajectography in Ski Racing. ION Press GPS/GNSS, 2003;3:9-12.
Skaloud J, Gontran H, Merminod B. GSM-Distributed RTK for precise analysis of speed skiing. 8th European Navigation Conference GNSS 2004. Rotterdam; 2011. P.120.
Waegli A, Skaloud J. Assessment of GPS/MEMS-IMU Integration Performance in Ski Racing. Presented at European Navigation Congress ENC-GNSS, Geneva; 2011. P. 40.
Pozzo R, Canclini A, Casasola S, Ciro D, Cotelli Ch, Baroni G. 3-D kinematic and kinetic analysis of G-slalom at Valbadia World Cup Race in 2002. In: Schena F (ed). International Congress “Mountain and Sport. Updating Study and Research from Laboratory to Field”, Programme and Book of Abstracts. Rovereto: Interuniversity Research Center in Bioengineering and Motor Science; 2005. P. 48.
Supej M. A step forward in 3D measurements in alpine skiing: a combination of an inertial suit and DGPS technology. In: Müller E, Lindinger S, Stöggl T, Fastenbauer V. (ed). 4th International Congress on Science and Skiing 2007, Salzburg: University of Salzburg; 2007. P. 100.
Supej M. 3D measurements of alpine skiing with an inertial sensor motion capture suit and GNSS RTK system. Sports Sciences, 2010, 28(7):759-769.
Giovanis V, Erdmann WS. Problem of outer slalom poles in alpine skiing. Gdansk: J. Sniadecki University, School of Physical Education; 1996. Report No.:1996-01. (in Polish)
Giovanis V, Giovani Ch, Kotrotsios S, Lapszo J. Review of methods of simulation in skiing. Physical Education–Sport–Health. 2010; 25:18-38 (in Greek).
Twardokens GR. Brachistochrone (i.e. shortest time) in skiing descents. In: Nosek M, Sojka D, Morrison WE, Susanka P (ed.). Proceedings of the VIIIth International Symposium of the Society of Biomechanics in Sports, Praha: Conex Company; 1990. P. 205-209.
Erdmann WS, Suchanowski A, Aschenbrenner P. Geometry and running of the alpine ski FIS World Cup giant slalom. Part one – geometry. In: Hong Y., Johns D. P. (ed). Proceedings, XVIII Symposium of the International Society of Biomechanics in Sports, The Chinese University of Hong Kong, 2000; 2: 637-641.
Erdmann WS, Giovanis V, Aschenbrenner P, Suchanowski A. Geometry and Running of the Alpine Ski FIS World Cup Giant Slalom, Part two – Velosity.In: Blackwell J.R. (ed). XIX International Symposium on Biomechanics in Sports. University of San Francisco; 2001. P. 5.
Erdmann WS, Aschenbrenner P. Geometry and running of the alpine ski FIS World Cup giant slalom. Part 3: Velocity as a function of geometry. In:K. E. Gianikellis. Cáceres (ed). Proceedings of the Exit International Symposium on Biomechanics in Sports, Cancers, Spain, Univ. de Extremadura. Servicio de; 2002. P. 101.
Erdmann WS, Giovanis V, Aschenbrenner P,Kyriakis V, Suchanowski A. Methods for acquiring data on terrain geomorphology, course geometry and kinematics of competitors’ runs in alpine skiing: a historical review.Acta of Bioengineering and Biomechanics. 2017; 19(1):69-79.
Giovanis V. Techniki tis chionodromias [Skiing technique]. Athens; 2006 (in Greek).
Giovanis V. Proponitiki sti chionodromia katavaseon [Coaching in Alpine skiing]. Athens; 2008. (in Greek).
EOS Naoussa–FIS. Hellenic Mountaineering Association. Ski Center - The data of the homologation track of slalom, giant slalom and super-giant slalom by the International Ski Federation (FIS). Topographic material of the route on dry ground "Aristotle" (Balcony) at 3-5 Pigadia (Naoussa), Greece; 1990.
Erdmann WS, Giovanis V. Incidents in alpine skiing giant slalom. In: Riehle H. J., Vieten M. M. (ed.) Proceedings, XVI Symposium of the International Symposium on Biomechanics in Sports, Konstanz: University of Konstanz; 1998. P. 311-312.
FIS. Injury Prevention. Oberhofen, Switzerland: International Ski Federation; 2011.
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