Measuring kinematic variables in front crawl swimming using accelerometers: a validation study

Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete. The purpose of this study is to use a multiple inertial measurement units to calculate Lap Time, Velocity, Stroke Count, Stroke Duration, Stroke Rate and Phases of the Stroke (Entry, Pull, Push, R...

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Published in:Sensors (Basel, Switzerland) Switzerland), 2015-05, Vol.15 (5), p.11363-11386
Main Author: Callaway, Andrew J
Format: Article
Language:English
Subjects:
Accelerometers
Algorithms
Biomechanics
Cameras
Coaching
Devices
Feedback
Kinematics
Mathematical analysis
performance analysis
Phases
Rolls
Searching
Sensors
Sport science
sports science
Strokes
Swimming
Validation studies
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description Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete. The purpose of this study is to use a multiple inertial measurement units to calculate Lap Time, Velocity, Stroke Count, Stroke Duration, Stroke Rate and Phases of the Stroke (Entry, Pull, Push, Recovery) in front crawl swimming. Using multiple units on the body, an algorithm was developed to calculate the phases of the stroke based on the relative position of the body roll. Twelve swimmers, equipped with these devices on the body, performed fatiguing trials. The calculated factors were compared to the same data derived to video data showing strong positive results for all factors. Four swimmers required individual adaptation to the stroke phase calculation method. The developed algorithm was developed using a search window relative to the body roll (peak/trough). This customization requirement demonstrates that single based devices will not be able to determine these phases of the stroke with sufficient accuracy.
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subjects Accelerometers
Algorithms
Biomechanics
Cameras
Coaching
Devices
Feedback
Kinematics
Mathematical analysis
performance analysis
Phases
Rolls
Searching
Sensors
Sport science
sports science
Strokes
Swimming
Validation studies
title Measuring kinematic variables in front crawl swimming using accelerometers: a validation study
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