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The validity of a head-worn inertial sensor for measurements of swimming performance

Lookup NU author(s): Dr Owen JeffriesORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by EDP Sciences, 2021.

For re-use rights please refer to the publisher's terms and conditions.


The validity of the TritonWear® device to measure swimming performance was investigated, with a pre-determined analytical goal of 6%. Twenty youth swimmers completed a 100 m swim in a 25 m pool, swimming breaststroke or freestyle wearing the TritonWear® device, whilst being filmed above and below water with three cameras. 95% Limits of Agreement (95% LoA) and coefficient of variation (CV%) were used to calculate error. Systematic biases (P < 0.05) were found between the two systems only for distance per stroke during breaststroke. Freestyle metrics agreement ranged between 1.06 % and 10.40 % CV, except for distance per stroke (CV = 14.64 %), and time underwater (CV = 18.15 %). Breaststroke metrics ranged between 0.95 % and 13.74 % CV, except for time underwater (CV = 25.76 %). The smallest errors were found for split-times, speed, stroke-count and stroke-rate, across both strokes (all < 5% CV). The TritonWear® can be used for basic metrics of performance, such as split-time and speed but the error of more complex measurements, such as time underwater or turn-times, renders them unable to identify typical performance changes.

Publication metadata

Author(s): Butterfield J, Tallent J, Patterson SD, Jeffries O, Howe L, Waldron M

Publication type: Article

Publication status: Published

Journal: Movement and Sport Sciences

Year: 2021

Volume: 114

Pages: 3-8

Online publication date: 18/09/2019

Acceptance date: 28/08/2019

Date deposited: 29/08/2019

ISSN (print): 2118-5735

ISSN (electronic): 2118-5743

Publisher: EDP Sciences


DOI: 10.1051/sm/2019027


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