Distinguishing between various types of techniques used in cyclic sports is critical for technical and tactical analyses. Cross-country skiing is a traditional representative of cyclic winter sports, which can also be prominent during the summer months using roller skis. To perform adequately on various terrains, two different, primary, skating techniques have emerged. The V1 technique, mostly applied on hilly or highresistance-low-speed sections, is characterized by one double-pole push every second stride. Whereas the V2 Version, mostly used on flat tracks, is performed using a double-pole push during each single skate-push. Former methods to analyze cyclic disciplines build upon stride analyses (Gohlitz et al., 1994), metabolic data and movement economy (Millet et al., 2000, Bonacci et al., 2010b), EMG studies (Chapman et al., 2008; 2009), or non-linear time series and chaos theory (Lyapunov, 1992; Wurdeman et al., 2013). Lately, more cost-efficient methods working with acceleration sensors have found their way into technique analyses enabling discrimination between various physical activities (Skotte et al., 2014; Yang & Hsu, 2010), the successive parts of a stroke in swimming (Ohgi et al., 2002; Nakashima et al., 2010), and in the context of cross-country skiing between the gears of the skating technique (Stöggl et al., 2014). Beyond classifying or distinguishing movement types or techniques, coaches are further interested in getting deeper insights into their athletes` motion quality regarding, forinstance, motion path, symmetry, or precision. The Attractor Method, developed by Vietenetal. (2013) and Vieten & Jensen (2015), is an approach based on acceleration and gyrometer data to produce sensitive results allowing the objective analysis of subtle intra- and interpersonal changes of movement patterns and its Variation. The aim of the current study was to introduce the Attractor method as a tool to analyze group and individual differences in V1 and V2 skating techniques in cross-country skiers. The group differences may highlight the key distinctions between both techniques whereas the individual analyses could provide useful information for coaches and scientists concerning personal stride characteristics with a goal of deriving an optimal movement.
© Copyright 2020 Science and Skiing VIII. Book of the 8th International Congress on Science and Skiing. Julkaistu Tekijä University of Jyväskylä; Vuokatti Sports Technology Unit of the Faculty of Sport and Health Sciences of the University of Jyväskylä. Kaikki oikeudet pidätetään. / Kääntänyt https://www.DeepL.com/Translator