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• W2888892313 abstract "In this study we present and validate a method to correct velocity and position drift for inertial sensor-based measurements in the context of alpine ski racing. Magnets were placed at each gate and their position determined using a land surveying method. The time point of gate crossings of the athlete were detected with a magnetometer attached to the athlete's lower back. A full body inertial sensor setup allowed to track the athlete's posture, and the magnet positions were used as anchor points to correct position and velocity drift from the integration of the acceleration. Centre of mass (CoM) position errors (mean ± standard deviation) were 0.24 m ± 0.09 m and CoM velocity errors were 0.00 m/s ± 0.18 m/s. For extracted turn entrance and exit speeds the 95% limits of agreements were between -0.19 m/s and 0.33 m/s. Limits of agreement for the total path length of a turn were between -0.06 m and 0.16 m. The proposed setup and processing allowed estimating the CoM kinematics with similar errors than known for differential global navigation systems (GNSS), even though the athlete's movement was measured with inertial and magnetic sensors only. Moreover, as the gate positions can also be obtained with non – GNSS based land surveying methods, CoM kinematics may be estimated in areas with reduced or no GNSS signal reception, such as in forests or indoors." @default.
• W2888892313 created "2018-09-07" @default.
• W2888892313 creator A5008931437 @default.
• W2888892313 creator A5050526508 @default.
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• W2888892313 date "2018-08-30" @default.
• W2888892313 modified "2023-09-30" @default.
• W2888892313 title "A New Training Assessment Method for Alpine Ski Racing: Estimating Center of Mass Trajectory by Fusing Inertial Sensors With Periodically Available Position Anchor Points" @default.
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• W2888892313 doi "https://doi.org/10.3389/fphys.2018.01203" @default.
• W2888892313 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6125645" @default.
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• W2888892313 hasPublicationYear "2018" @default.
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