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Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports

Wundersitz, Daniel W., Gastin, Paul B., Robertson, Samuel J. and Netto, Kevin J. 2015, Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports, International journal of sports physiology and performance, vol. 10, no. 6, pp. 681-686, doi: 10.1123/ijspp.2014-0381.

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Title Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports
Author(s) Wundersitz, Daniel W.
Gastin, Paul B.ORCID iD for Gastin, Paul B.
Robertson, Samuel J.
Netto, Kevin J.
Journal name International journal of sports physiology and performance
Volume number 10
Issue number 6
Start page 681
End page 686
Total pages 6
Publisher Human Kinetics
Place of publication Champaign, IL.
Publication date 2015-09
ISSN 1555-0265
Keyword(s) Acceleration
Motion analysis
Summary CONTEXT: Accelerometer peak impact accelerations are being used to measure player physical demands in contact sports. However, their accuracy to do so has not been ascertained. PURPOSE: To compare peak-impact-acceleration data from an accelerometer contained in a wearable tracking device with a 3-dimensional motion-analysis (MA) system during tackling and bumping. METHODS: Twenty-five semielite rugby athletes wore a tracking device containing a 100-Hz triaxial accelerometer (MinimaxX S4, Catapult Innovations, Australia). A single retroreflective marker was attached to the device, with its position recorded by a 12-camera MA system during 3 physical-collision tasks (tackle bag, bump pad, and tackle drill; N = 625). The accuracy, effect size, agreement, precision, and relative errors for each comparison were obtained as measures of accelerometer validity. RESULTS: Physical-collision peak impact accelerations recorded by the accelerometer overestimated (mean bias 0.60 g) those recorded by the MA system (P < .01). Filtering the raw data at a 20-Hz cutoff improved the accelerometer's relationship with MA data (mean bias 0.01 g; P > .05). When considering the data in 9 magnitude bands, the strongest relationship with the MA system was found in the 3.0-g or less band, and the precision of the accelerometer tended to reduce as the magnitude of impact acceleration increased. Of the 3 movements performed, the tackle-bag task displayed the greatest validity with MA. CONCLUSIONS: The findings indicate that the MinimaxX S4 accelerometer can accurately measure physical-collision peak impact accelerations when data are filtered at a 20-Hz cutoff frequency. As a result, accelerometers may be useful to measure physical collisions in contact sports.
Language eng
DOI 10.1123/ijspp.2014-0381
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Human Kinetics
Free to Read? Yes
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Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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Citation counts: TR Web of Science Citation Count  Cited 6 times in TR Web of Science
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Created: Thu, 10 Sep 2015, 15:22:40 EST

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