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Downhill turn techniques and associated physical characteristics in cross-country skiers
(Swedish Winter Sports Research Centre)
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. Department of Biomechanics, Faculty of Sport, University of Ljubljana, Ljubljana, Slovenia. (NVC)
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. Department of Human Movement Science, Norwegian University of Science and Technology, Trondheim, Norway. (NVC)
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (Swedish Winter Sports Research Centre)ORCID iD: 0000-0002-3814-6246
2014 (English)In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 24, no 4, 708-716 p.Article in journal (Refereed) Published
Abstract [en]

Three dominant techniques are used for downhill turning in cross-country skiing. In this study, kinematic, kinetic, and temporal characteristics of these techniques are described and related to skier strength and power. Twelve elite female cross-country skiers performed six consecutive turns of standardized geometry while being monitored by a Global Navigation Satellite System. Overall time was used as an indicator of performance. Skiing and turning parameters were determined from skier trajectories; the proportional use of each technique was determined from video analysis. Leg strength and power were determined by isometric squats and countermovement jumps on a force plate. Snow plowing, parallel skidding, and step turning were utilized for all turns. Faster skiers employed less snow plowing and more step turning, more rapid deceleration and earlier initiation of step turning at higher speed (r = 0.80–0.93; all P < 0.01). Better performance was significantly correlated to higher mean speed and shorter trajectory (r

= 0.99/0.65; both P < 0.05) and to countermovement jump characteristics of peak force, time to peak force, and rate of force development (r  = -0.71/0.78/-0.83; all P < 0.05). In conclusion, faster skiers used step turning to a greater extent and exhibited higher maximal leg power, which enabled them to combine high speeds with shorter trajectories during turns.

Place, publisher, year, edition, pages
Blackwell Munksgaard, 2014. Vol. 24, no 4, 708-716 p.
Keyword [en]
GPS, Leg strength and power, Mechanics, Nordic skiing
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:miun:diva-20912DOI: 10.1111/sms.12063ISI: 000339716800025Scopus ID: 2-s2.0-84904408699OAI: oai:DiVA.org:miun-20912DiVA: diva2:683004
Projects
Swedish Winter Sports Research CentreIntegrative Physiolgy & Biomechanics: dGPS technology - an efficient device to analyse performance in XC SkiingInnovative Biomechanical Olympic Performance Technology (OPT)
Note

Publ online 20 March 2013

Available from: 2014-01-01 Created: 2014-01-01 Last updated: 2015-03-16Bibliographically approved

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Supej, MatejSandbakk, ØyvindHolmberg, Hans-Christer
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