MORPHOLOGICAL ANALYSIS OF ACCELERATION SIGNALS IN CROSS-COUNTRY SKIING - Information Extraction and Technique Transitions Detection

Håvard Myklebust, Neuza Nunes, Jostein Hallén, Hugo Gamboa

2011

Abstract

Aims: Experience morphology of acceleration signals, extract useful information and classify time periods into defined techniques during cross-country skiing. Method: Three Norwegian cross-country skiers ski skated one lap in the 2011 world championship sprint track as fast as possible with 5 accelerometers attached to their body and equipment. Algorithms for detecting ski/pole hits and leaves and computing specific ski parameters like cycle times (CT), poling/pushing times (PT), recovery times (RT), symmetry between left and right side and technique transition times were developed based on thresholds and validated against video. Results: In stable and repeated techniques, pole hits/leaves and ski leaves were detected 99% correctly, while ski hits were more difficult to detect (77%). From these hit and leave values CT, PT, RT, symmetry and technique transitions were successfully calculated. Conclusion: Accelerometers can definitely contribute to biomechanical research in cross-country skiing and studies combining force, position and accelerometer data will probably be seen more frequently in the future.

Paper Citation

in Harvard Style

Myklebust H., Nunes N., Hallén J. and Gamboa H. (2011). MORPHOLOGICAL ANALYSIS OF ACCELERATION SIGNALS IN CROSS-COUNTRY SKIING - Information Extraction and Technique Transitions Detection . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011) ISBN 978-989-8425-35-5, pages 510-517. DOI: 10.5220/0003170605100517

in Bibtex Style

@conference{biosignals11,
author={Håvard Myklebust and Neuza Nunes and Jostein Hallén and Hugo Gamboa},
title={MORPHOLOGICAL ANALYSIS OF ACCELERATION SIGNALS IN CROSS-COUNTRY SKIING - Information Extraction and Technique Transitions Detection},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011)},
year={2011},
pages={510-517},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003170605100517},
isbn={978-989-8425-35-5},
}

in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2011)
TI - MORPHOLOGICAL ANALYSIS OF ACCELERATION SIGNALS IN CROSS-COUNTRY SKIING - Information Extraction and Technique Transitions Detection
SN - 978-989-8425-35-5
AU - Myklebust H.
AU - Nunes N.
AU - Hallén J.
AU - Gamboa H.
PY - 2011
SP - 510
EP - 517
DO - 10.5220/0003170605100517