Is a Head-Worn Inertial Sensor a Valid Tool to Monitor Swimming?

Shell, SJ; Clark, B; Broatch, JR; Slattery, K; Halson, SL; Coutts, AJ

Is a Head-Worn Inertial Sensor a Valid Tool to Monitor Swimming?

Shell, SJ Clark, B Broatch, JR Slattery, K

Halson, SL Coutts, AJ

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Publisher:: Human Kinetics
Publication Type:: Journal Article
Citation:: Int J Sports Physiol Perform, 2021, 16, (12), pp. 1-4
Issue Date:: 2021-05-21

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	2021 IJSPP Shell et al. Is a head-worn inertial sensor a valid tool to monitor swimming.pdf	Accepted version	293.08 kB	Adobe PDF	View/Open

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Field	Value	Language
dc.contributor.author	Shell, SJ
dc.contributor.author	Clark, B
dc.contributor.author	Broatch, JR
dc.contributor.author	Slattery, K https://orcid.org/0000-0002-2879-5488
dc.contributor.author	Halson, SL
dc.contributor.author	Coutts, AJ
dc.date.accessioned	2022-01-25T02:07:44Z
dc.date.available	2021-03-02
dc.date.available	2022-01-25T02:07:44Z
dc.date.issued	2021-05-21
dc.identifier.citation	Int J Sports Physiol Perform, 2021, 16, (12), pp. 1-4
dc.identifier.issn	1555-0265
dc.identifier.issn	1555-0273
dc.identifier.uri	http://hdl.handle.net/10453/153546
dc.description.abstract	PURPOSE: This study aimed to independently validate a wearable inertial sensor designed to monitor training and performance metrics in swimmers. METHODS: A total of 4 male (21 [4] y, 1 national and 3 international) and 6 female (22 [3] y, 1 national and 5 international) swimmers completed 15 training sessions in an outdoor 50-m pool. Swimmers were fitted with a wearable device (TritonWear, 9-axis inertial measurement unit with triaxial accelerometer, gyroscope, and magnetometer), placed under the swim cap on top of the occipital protuberance. Video footage was captured for each session to establish criterion values. Absolute error, standardized effect, and Pearson correlation coefficient were used to determine the validity of the wearable device against video footage for total swim distance, total stroke count, mean stroke count, and mean velocity. A Fisher exact test was used to analyze the accuracy of stroke-type identification. RESULTS: Total swim distance was underestimated by the device relative to video analysis. Absolute error was consistently higher for total and mean stroke count, and mean velocity, relative to video analysis. Across all sessions, the device incorrectly detected total time spent in backstroke, breaststroke, butterfly, and freestyle by 51% (15%). The device did not detect time spent in drill. Intraclass correlation coefficient results demonstrated excellent intrarater reliability between repeated measures across all swimming metrics. CONCLUSIONS: The wearable device investigated in this study does not accurately measure distance, stroke count, and velocity swimming metrics or detect stroke type. Its use as a training monitoring tool in swimming is limited.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Human Kinetics
dc.relation	Australian Institute of Sport
dc.relation.ispartof	Int J Sports Physiol Perform
dc.relation.isbasedon	10.1123/ijspp.2020-0887
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	1106 Human Movement and Sports Sciences, 1116 Medical Physiology, 1701 Psychology
dc.subject.classification	Sport Sciences
dc.title	Is a Head-Worn Inertial Sensor a Valid Tool to Monitor Swimming?
dc.type	Journal Article
utslib.citation.volume	16
utslib.location.activity	United States
utslib.for	1106 Human Movement and Sports Sciences
utslib.for	1116 Medical Physiology
utslib.for	1701 Psychology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
pubs.organisational-group	/University of Technology Sydney/Strength - CHT - Health Technologies
pubs.organisational-group	/University of Technology Sydney/Centre for Health Technologies (CHT)
utslib.copyright.status	closed_access	*
dc.date.updated	2022-01-25T02:07:41Z
pubs.issue	12
pubs.publication-status	Published online
pubs.volume	16
utslib.citation.issue	12

Abstract:

PURPOSE: This study aimed to independently validate a wearable inertial sensor designed to monitor training and performance metrics in swimmers. METHODS: A total of 4 male (21 [4] y, 1 national and 3 international) and 6 female (22 [3] y, 1 national and 5 international) swimmers completed 15 training sessions in an outdoor 50-m pool. Swimmers were fitted with a wearable device (TritonWear, 9-axis inertial measurement unit with triaxial accelerometer, gyroscope, and magnetometer), placed under the swim cap on top of the occipital protuberance. Video footage was captured for each session to establish criterion values. Absolute error, standardized effect, and Pearson correlation coefficient were used to determine the validity of the wearable device against video footage for total swim distance, total stroke count, mean stroke count, and mean velocity. A Fisher exact test was used to analyze the accuracy of stroke-type identification. RESULTS: Total swim distance was underestimated by the device relative to video analysis. Absolute error was consistently higher for total and mean stroke count, and mean velocity, relative to video analysis. Across all sessions, the device incorrectly detected total time spent in backstroke, breaststroke, butterfly, and freestyle by 51% (15%). The device did not detect time spent in drill. Intraclass correlation coefficient results demonstrated excellent intrarater reliability between repeated measures across all swimming metrics. CONCLUSIONS: The wearable device investigated in this study does not accurately measure distance, stroke count, and velocity swimming metrics or detect stroke type. Its use as a training monitoring tool in swimming is limited.

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http://hdl.handle.net/10453/153546