Lower body reaction testing using ultrasonic motion capture

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Title: Lower body reaction testing using ultrasonic motion capture
Authors: Taylor, Ken
Lennon, Olive
Blake, Catherine
Fitzgerald, Diarmaid
Fox, Domhnaill
Bleakley, Chris J.
Permanent link: http://hdl.handle.net/10197/7088
Date: 30-Aug-2014
Abstract: This paper presents a lower body reaction test that utilizes a new portable ultra-sound based motion capture system (MobiFit) combined with a synchronized visual stimulus. This novel system was tested first for criterion validity and agreement against a gold standard laboratory based optical motion capture system (CODA). It was subsequently tested in the field during Gaelic football (GAA) team gym sessions with 35 subjects to demonstrate its utility and versatility. The lower body reaction test itself is novel in that it can be applied to a gross motor task. During testing, participants had sensors attached to their lower limbs and trunk. The speed of movement for each sensor was monitored at 500Hz using the Mobifit motion capture system, and reaction time was measured as the elapsed time from the appearance of a green indicator on the screen to a sensor reaching a set threshold velocity as the participant raised the corresponding leg. Pearson's correlation coefficient tested criterion validity against the CODA system and Intra class correlation coefficients and Bland-Altman plots assessed agreement of velocity measures obtained from the MobiFit and CODA systems. Results indicate that the MobiFit system is an accurate device to assess lower body reaction time and has advantage over standard laboratory measures in terms of portability and ease of set-up.
Funding Details: Enterprise Ireland
Type of material: Conference Publication
Publisher: IEEE
Copyright (published version): 2014 IEEE
Keywords: Biomechanics;Biomedical measurement;Biomedical ultrasonics;Motion measurement
DOI: 10.1109/EMBC.2014.6943649
Language: en
Status of Item: Peer reviewed
Conference Details: 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Chicago, USA, 26 - 30 August 2014
Appears in Collections:Computer Science Research Collection

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