Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports
© 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...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Human Kinetics Publishers Inc.
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/22407 |
| _version_ | 1848750862310047744 |
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| author | Wundersitz, D. Gastin, P. Robertson, S. Netto, Kevin |
| author_facet | Wundersitz, D. Gastin, P. Robertson, S. Netto, Kevin |
| author_sort | Wundersitz, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 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. |
| first_indexed | 2025-11-14T07:43:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-22407 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:43:34Z |
| publishDate | 2015 |
| publisher | Human Kinetics Publishers Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-224072017-09-13T13:52:24Z Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports Wundersitz, D. Gastin, P. Robertson, S. Netto, Kevin © 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. 2015 Journal Article http://hdl.handle.net/20.500.11937/22407 10.1123/ijspp.2014-0381 Human Kinetics Publishers Inc. restricted |
| spellingShingle | Wundersitz, D. Gastin, P. Robertson, S. Netto, Kevin Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| title | Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| title_full | Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| title_fullStr | Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| title_full_unstemmed | Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| title_short | Validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| title_sort | validity of a trunk-mounted accelerometer to measure physical collisions in contact sports |
| url | http://hdl.handle.net/20.500.11937/22407 |