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Tierney, G, Rowson, S, Gellner, R, Allan, D, Iqbal, S, Biglarbeigi, P, Tooby, J, Woodward, J and Payam, AF (2024) Head Exposure to Acceleration Database in Sport (HEADSport): a kinematic signal processing method to enable instrumented mouthguard (iMG) field-based inter-study comparisons. BMJ Open Sport & Exercise Medicine, 10 (1).
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Head Exposure to Acceleration Database in Sport HEAD Sport a kinematic signal processing method to enable instrumented mouthguard.pdf - Published Version Available under License Creative Commons Attribution Non-commercial. Download (1MB) | Preview |
Abstract
Objective Instrumented mouthguard (iMG) systems use different signal processing approaches limiting field-based inter-study comparisons, especially when artefacts are present in the signal. The objective of this study was to assess the frequency content and characteristics of head kinematic signals from head impact reconstruction laboratory and field-based environments to develop an artefact attenuation filtering method (HEADSport filter method). Methods Laboratory impacts (n=72) on a test-dummy headform ranging from 25 to 150 g were conducted and 126 rugby union players were equipped with iMGs for 209 player-matches. Power spectral density (PSD) characteristics of the laboratory impacts and on-field head acceleration events (HAEs) (n=5694) such as the 95th percentile cumulative sum PSD frequency were used to develop the HEADSport method. The HEADSport filter method was compared with two other common filtering approaches (Butterworth-200Hz and CFC180 filter) through signal-to-noise ratio (SNR) and mixed linear effects models for laboratory and on-field events, respectively. Results The HEADSport filter method produced marginally higher SNR than the Butterworth-200Hz and CFC180 filter and on-field peak linear acceleration (PLA) and peak angular acceleration (PAA) values within the magnitude range tested in the laboratory. Median PLA and PAA (and outlier values) were higher for the CFC180 filter than the Butterworth-200Hz and HEADSport filter method (p<0.01). Conclusion The HEADSport filter method could enable iMG field-based inter-study comparisons and is openly available at https://github.com/GTBiomech/HEADSport-Filter-Method.
| Item Type: | Article |
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| Uncontrolled Keywords: | Concussion; Filtering; Head; Rugby; 1106 Human Movement and Sports Sciences |
| Subjects: | R Medicine > RC Internal medicine > RC1200 Sports Medicine |
| Divisions: | Sport and Exercise Sciences |
| Publisher: | BMJ Publishing Group |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 02 Dec 2024 15:16 |
| Last Modified: | 02 Dec 2024 15:30 |
| DOI or ID number: | 10.1136/bmjsem-2023-001758 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/24964 |
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