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Title: Influence of Turn Cycle Structure on Performance of Elite Alpine Skiers Assessed through an IMU in Different Slalom Course Settings
Author: Pérez-Chirinos Buxadé, Carla
Padullés Riu, Josep Maria
Gavaldà Castet, Dani
Trabucchi, Michela
Fernández-Valdés Villa, Bruno
Tuyà Viñas, Sílvia
Moras Feliu, Gerard
Keywords: Cinemàtica
Esquí alpí
Downhill skiing
Issue Date: 25-Jan-2022
Publisher: MDPI
Abstract: Small differences in turn cycle structure, invisible to the naked eye, could be decisive in improving descent performance. The aim of this study was to assess the influence of turn cycle structure on the performance of elite alpine skiers using an inertial measurement unit (IMU) in different slalom (SL) course settings. Four SL courses were set: a flat-turned (FT), a steep-turned (ST), a flat-straighter (FS) and a steep-straighter (SS). Five elite alpine skiers (21.2 ± 3.3 years, 180.2 ± 5.6 cm, 72.8 ± 6.6 kg) completed several runs at maximum speed for each SL course. A total of 77 runs were obtained. Fast total times correlate with a longer initiation (INI) time in FT, a shorter steering time out of the turn (STEOUT) in the FT and FS and a shorter total steering time (STEIN+OUT) in the FT and SS courses. The linear mixed model used for the analysis revealed that in the FT-course for each second increase in the INI time, the total time is reduced by 0.45 s, and for every one-second increase in the STEOUT and STEIN+OUT times, the total time increases by 0.48 s and 0.31 s, respectively. Thus, to enhance descent performance, the skier should lengthen the INI time and shorten the STEOUT and STEIN+OUT time. Future studies could use an IMU to detect turn phases and analyze them using the other built-in sensors.
Note: Reproducció del document publicat a:
It is part of: Sensors, 2022, vol. 22, num. 3, p. 1-15
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ISSN: 1424-8220
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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