| Accelerometer counts and raw acceleration output in relation to mechanical loading. | |
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MedLine Citation:
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PMID: 22218284 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The purpose of this study was to assess the relationship of accelerometer output, in counts (ActiGraph GT1M) and as raw accelerations (ActiGraph GT3X+ and GENEA), with ground reaction force (GRF) in adults. Ten participants (age: 29.4±8.2yr, mass: 74.3±9.8kg, height: 1.76±0.09m) performed eight trials each of: slow walking, brisk walking, slow running, faster running and box drops. GRF data were collected for one step per trial (walking and running) using a force plate. Low jumps and higher jumps (one per second) were performed for 20s each on the force plate. For box drops, participants dropped from a 20cm box onto the force plate. Throughout, three accelerometers were worn at the hip: GT1M, GT3X+ and GENEA. A further GT3X+ and GENEA were worn on the left and right wrist, respectively. GT1M counts correlated with peak impact force (r=0.85, p<0.05), average resultant force (r=0.73, p<0.05) and peak loading rate (r=0.76, p<0.05). Accelerations from the GT3X+ and GENEA correlated with average resultant force and peak loading rate irrespective of whether monitors were worn at the hip or wrist (r>0.82, p<0.05, r>0.63 p<0.05, respectively). In conclusion, accelerometer count and raw acceleration output correlate positively with GRF and thus may be appropriate for the quantification of activity beneficial to bone. Wrist-worn monitors show a similar relationship with GRF as hip-worn monitors, suggesting that wrist-worn monitors may be a viable option for future studies looking at bone health. |
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Authors:
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A V Rowlands; V H Stiles |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-2 |
Journal Detail:
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Title: Journal of biomechanics Volume: - ISSN: 1873-2380 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Sansom Institute for Health Research, School of Health Sciences, University of South Australia, Adelaide, SA, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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