Quantifying habitual levels of physical activity according to impact in older people: accelerometry protocol for the VIBE study

Deere, KC, Hannam, K, Coulson, J ORCID: https://orcid.org/0000-0001-9758-6295, Ireland, A, McPhee, JS, Moss, C, Edwards, MH, Dennison, E, Cooper, C, Sayers, A, Lipperts, M, Grimm, B and Tobias, JH, 2016. Quantifying habitual levels of physical activity according to impact in older people: accelerometry protocol for the VIBE study. Journal of Aging and Physical Activity, 24 (2), pp. 290-295. ISSN 1063-8652

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Abstract

Physical activity (PA) may need to produce high impacts to be osteogenic. The aim of this study was to identify threshold(s) for defining high impact PA for future analyses in the VIBE (Vertical Impact and Bone in the Elderly) study, based on home recordings with triaxial accelerometers. Recordings were obtained from 19 Master Athlete Cohort (MAC; mean 67.6 years) and 15 Hertfordshire Cohort Study (HCS; mean 77.7 years) participants. Data cleaning protocols were developed to exclude artifacts. Accelerations expressed in g units were categorized into three bands selected from the distribution of positive Y-axis peak accelerations. Data were available for 6.6 and 4.4 days from MAC and HCS participants respectively, with approximately 14 hr recording daily. Three-fold more 0.5–1.0g impacts were observed in MAC versus HCS, 20-fold more 1.0–1.5g impacts, and 140-fold more impacts ≥ 1.5g. Our analysis protocol successfully distinguishes PA levels in active and sedentary older individuals.

Item Type:	Journal article
Publication Title:	Journal of Aging and Physical Activity
Creators:	Deere, K.C., Hannam, K., Coulson, J., Ireland, A., McPhee, J.S., Moss, C., Edwards, M.H., Dennison, E., Cooper, C., Sayers, A., Lipperts, M., Grimm, B. and Tobias, J.H.
Publisher:	Human Kinetics
Date:	April 2016
Volume:	24
Number:	2
ISSN:	1063-8652
Identifiers:	Number Type 10.1123/japa.2015-0066 DOI
Rights:	This is an Open Access article distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by-nc/4.0/, which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.This license does not cover any third-party material which may appear with permission in the article. For commercial use, permission should be requested from Human Kinetics, Inc., through the Copyright Clearance Center (http://www.copyright.com).
Divisions:	Schools > School of Science and Technology
Record created by:	Jill Tomkinson
Date Added:	02 Jul 2018 14:36
Last Modified:	17 Sep 2018 09:04
URI:	https://irep.ntu.ac.uk/id/eprint/33945

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