Front-crawl instantaneous velocity estimation using a wearable inertial measurement unit.

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Serval ID
serval:BIB_8EA34C0E2F8B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Front-crawl instantaneous velocity estimation using a wearable inertial measurement unit.
Journal
Sensors
Author(s)
Dadashi F., Crettenand F., Millet G.P., Aminian K.
ISSN
1424-8220 (Electronic)
ISSN-L
1424-8220
Publication state
Published
Issued date
2012
Peer-reviewed
Oui
Volume
12
Number
10
Pages
12927-12939
Language
english
Abstract
Monitoring the performance is a crucial task for elite sports during both training and competition. Velocity is the key parameter of performance in swimming, but swimming performance evaluation remains immature due to the complexities of measurements in water. The purpose of this study is to use a single inertial measurement unit (IMU) to estimate front crawl velocity. Thirty swimmers, equipped with an IMU on the sacrum, each performed four different velocity trials of 25 m in ascending order. A tethered speedometer was used as the velocity measurement reference. Deployment of biomechanical constraints of front crawl locomotion and change detection framework on acceleration signal paved the way for a drift-free integration of forward acceleration using IMU to estimate the swimmers velocity. A difference of 0.6 ± 5.4 cm · s(-1) on mean cycle velocity and an RMS difference of 11.3 cm · s(-1) in instantaneous velocity estimation were observed between IMU and the reference. The most important contribution of the study is a new practical tool for objective evaluation of swimming performance. A single body-worn IMU provides timely feedback for coaches and sport scientists without any complicated setup or restraining the swimmer's natural technique.
Keywords
accelerometer, gyroscope, biomechanical constraint, strap-down integration, swimming velocity
Pubmed
Web of science
Open Access
Yes
Create date
19/09/2012 11:36
Last modification date
20/08/2019 14:52
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