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Article

Influence of Turn Cycle Structure on Performance of Elite Alpine Skiers Assessed through an IMU in Different Slalom Course Settings

1
National Institute of Physical Education of Catalonia (INEFC), University of Barcelona (UB), 08038 Barcelona, Spain
2
Val d’Aran School of Sports Technicians (ETEVA), 25598 Lleida, Spain
3
Department of Condensed Matter Physics, University of Barcelona (UB), 08028 Barcelona, Spain
4
School of Health Sciences, TecnoCampus, Pompeu Fabra University, 08302 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: Christian Clermont and Darren Stefanyshyn
Sensors 2022, 22(3), 902; https://doi.org/10.3390/s22030902
Received: 30 December 2021 / Revised: 19 January 2022 / Accepted: 24 January 2022 / Published: 25 January 2022
(This article belongs to the Special Issue Wearable Sensors for Biomechanical Monitoring in Sport)
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. View Full-Text
Keywords: inertial measurement unit; wearable sensor; sports biomechanics; kinematics; skiing; turn phases; accelerometer; magnetometer inertial measurement unit; wearable sensor; sports biomechanics; kinematics; skiing; turn phases; accelerometer; magnetometer
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MDPI and ACS Style

Pérez-Chirinos Buxadé, C.; Padullés Riu, J.M.; Gavaldà Castet, D.; Trabucchi, M.; Fernández-Valdés, B.; Tuyà Viñas, S.; Moras Feliu, G. Influence of Turn Cycle Structure on Performance of Elite Alpine Skiers Assessed through an IMU in Different Slalom Course Settings. Sensors 2022, 22, 902. https://doi.org/10.3390/s22030902

AMA Style

Pérez-Chirinos Buxadé C, Padullés Riu JM, Gavaldà Castet D, Trabucchi M, Fernández-Valdés B, Tuyà Viñas S, Moras Feliu G. Influence of Turn Cycle Structure on Performance of Elite Alpine Skiers Assessed through an IMU in Different Slalom Course Settings. Sensors. 2022; 22(3):902. https://doi.org/10.3390/s22030902

Chicago/Turabian Style

Pérez-Chirinos Buxadé, Carla, Josep Maria Padullés Riu, Dani Gavaldà Castet, Michela Trabucchi, Bruno Fernández-Valdés, Sílvia Tuyà Viñas, and Gerard Moras Feliu. 2022. "Influence of Turn Cycle Structure on Performance of Elite Alpine Skiers Assessed through an IMU in Different Slalom Course Settings" Sensors 22, no. 3: 902. https://doi.org/10.3390/s22030902

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