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dc.contributor.authorWundersitz, D.
dc.contributor.authorGastin, P.
dc.contributor.authorRobertson, S.
dc.contributor.authorNetto, Kevin
dc.date.accessioned2017-01-30T12:31:09Z
dc.date.available2017-01-30T12:31:09Z
dc.date.created2015-10-29T04:08:45Z
dc.date.issued2015
dc.identifier.citationWundersitz, D. and Gastin, P. and Robertson, S. and Netto, K. 2015. Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports. International Journal of Sports Physiology and Performance. 10 (6): pp. 681-686.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/22407
dc.identifier.doi10.1123/ijspp.2014-0381
dc.description.abstract

© 2015 Human Kinetics, Inc. 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.

dc.publisherHuman Kinetics Publishers Inc.
dc.titleValidity of a trunk-mounted accelerometer to measure physical collisions in contact sports
dc.typeJournal Article
dcterms.source.volume10
dcterms.source.number6
dcterms.source.startPage681
dcterms.source.endPage686
dcterms.source.issn1555-0265
dcterms.source.titleInternational Journal of Sports Physiology and Performance
curtin.departmentSchool of Physiotherapy and Exercise Science
curtin.accessStatusFulltext not available


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