Automatic Swimming Activity Recognition and Lap Time Assessment Based on a Single IMU: A Deep Learning Approach - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Journal Articles Sensors Year : 2022

Automatic Swimming Activity Recognition and Lap Time Assessment Based on a Single IMU: A Deep Learning Approach

Abstract

This study presents a deep learning model devoted to the analysis of swimming using a single Inertial Measurement Unit (IMU) attached to the sacrum. Gyroscope and accelerometer data were collected from 35 swimmers with various expertise levels during a protocol including the four swimming techniques. The proposed methodology took high inter- and intra-swimmer variability into account and was set up for the purpose of predicting eight swimming classes (the four swimming techniques, rest, wallpush, underwater, and turns) at four swimming velocities ranging from low to maximal. The overall F1-score of classification reached 0.96 with a temporal precision of 0.02 s. Lap times were directly computed from the classifier thanks to a high temporal precision and validated against a video gold standard. The mean absolute percentage error (MAPE) for this model against the video was 1.15%, 1%, and 4.07%, respectively, for starting lap times, middle lap times, and ending lap times. This model is a first step toward a powerful training assistant able to analyze swimmers with various levels of expertise in the context of in situ training monitoring.
Fichier principal
Vignette du fichier
sensors-22-05786.pdf (580.04 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03775394 , version 1 (12-09-2022)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Erwan Delhaye, Antoine Bouvet, Guillaume Nicolas, João Paulo Vilas-Boas, Benoit Bideau, et al.. Automatic Swimming Activity Recognition and Lap Time Assessment Based on a Single IMU: A Deep Learning Approach. Sensors, 2022, 22 (15), pp.5786. ⟨10.3390/s22155786⟩. ⟨hal-03775394⟩
61 View
45 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More