Scaling of upper-body power output to predict timetrial roller skiing performance
Deutscher übersetzter Titel: | Messung der Oberkörperkraft zur Vorhersage der Leistungsfähigkeit im Zeitfahren beim Rollski |
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Autor: | Carlsson, Tomas; Carlsson, Magnus; Hammarström, Daniel; Malm, Christer; Tonkonogi, Michail |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 31 (2013), 6, S. 582-588, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640414.2012.744079 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201403003200 |
Quelle: | BISp |
Abstract
The purpose of the present study was to establish the most appropriate allometric model to predict mean skiing speed during a double-poling roller skiing time-trial using scaling of upper-body power output. Forty-five Swedish junior cross-country skiers (27 men and 18 women) of national and international standard were examined. The skiers, who had a body mass (m) of 69.3 ± 8.0 kg (mean ± s), completed a 120-s double-poling test on a ski ergometer to determine their mean upper-body power output (W). Performance data were subsequently obtained from a 2-km time-trial, using the double-poling technique, to establish mean roller skiing speed. A proportional allometric model was used to predict skiing speed. The optimal model was found to be: Skiing speed = 1.057 * W0.556 * m70.315, which explained 58.8% of the variance in mean skiing speed (P < 0.001). The 95% confidence intervals for the scaling factors ranged from 0.391 to 0.721 for W and from 70.626 to 70.004 for m. The results in this study suggest that allometric scaling of upper-body power output is preferable for the prediction of performance of junior cross-country skiers rather than absolute expression or simple ratio-standard scaling of upper-body power output. Verf.-Referat