A Comparison of Computational Methods to Determine Intrastroke Velocity in Swimming Using IMUs

No Thumbnail Available
File version
Author(s)
Worsey, Matthew TO
Pahl, Rebecca
Thiel, David V
Milburn, Peter D
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2018
Size
File type(s)
Location
License
Abstract

Sacrum located IMU sensors were used to monitor three-axis acceleration and three-axis rotation from elite swimmers in competition conditions. The intrastroke velocity was determined for each swimmer using their preferred swim stroke (freestyle, backstroke, and breaststroke) using three different calculation techniques-dual-axis acceleration, dualaxis acceleration eliminating the static gravity constant, and altitude and heading reference system. The mean intrastroke velocity variation (averaged over one 50-m lap) in freestyle swimming was less than 0.6% in all cases. This resulted in a timing under-estimate of less than 0.60 ms for freestyle, 4.0 ms for breaststroke, and a timing overestimate of less than 6.2 ms for backstroke. The difference was less than 5% over the complete stroke (one way ANOVA p > 0.05), indicating no significant difference in the velocity profiles. These simple, robust analysis techniques can be used to quantify variations in every stroke as the swimmer fatigues, providing significant information to coaching staff and athletes.

Journal Title

IEEE Sensors Letters

Conference Title
Book Title
Edition
Volume

2

Issue

1

Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Electronics, sensors and digital hardware

Persistent link to this record
Citation

Worsey, MTO; Pahl, R; Thiel, DV; Milburn, PD, A Comparison of Computational Methods to Determine Intrastroke Velocity in Swimming Using IMUs, IEEE Sensors Letters, 2018, 2 (1), pp. 1-4

Collections