Journal
PREVENTIVE MEDICINE
Volume 91, Issue -, Pages 389-394Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ypmed.2016.06.017
Keywords
Physical activity status; Physical activity recommendations; Physical activity monitoring; Physical activity energy expenditure; Exercise
Funding
- National Prevention Research Initiative (Medical Research Council) [MR/J00040X/1]
- Alzheimer's Research Trust
- Alzheimer's Society
- Biotechnology and Biological Sciences Research Council
- British Heart Foundation
- Cancer Research UK
- Chief Scientist Office, Scottish Government Health Directorate
- Department of Health
- Diabetes UK
- Economic and Social Research Council
- Health and Social Care Research and Development Division of the Public Health Agency
- Medical Research Council
- Stroke Association
- Wellcome Trust
- Welsh Assembly Government
- World Cancer Research Fund
- Medical Research Council [MR/J00040X/1, MR/K02325X/1] Funding Source: researchfish
- MRC [MR/J00040X/1] Funding Source: UKRI
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Wearable devices to self-monitor physical activity have become popular with individuals and healthcare practitioners as a route to the prevention of chronic disease. It is not currently possible to reconcile feedback from these devices with activity recommendations because the guidelines refer to the amount of activity required on top of normal lifestyle activities (e.g., 150 minutes of moderate-to-vigorous intensity activity per week over-and-above normal moderate-to-vigorous lifestyle activities). The aim of this study was to recalibrate the feedback from self-monitoring. We pooled data from four studies conducted between 2006 and 2014 in patients and volunteers from the community that included both sophisticated measures of physical activity and 10-year risk for cardiovascular disease and type 2 diabetes (n = 305). We determined the amount of moderate-to-vigorous intensity activity that corresponded to FAO/WHO/UNU guidance for a required PAL of 1.75 (Total Energy Expenditure/Basal Metabolic Rate). Our results show that, at the UK median PAL, total moderate-to-vigorous intensity physical activity will be around 735 minutes per week (similar to 11% of waking time). We estimate that a 4% increase in moderate-to-vigorous intensity activity will achieve standardised guidance from FAO/WHO/UNU and will require similar to 1000 minutes of moderate-to-vigorous intensity activity per week. This study demonstrates that feedback from sophisticated wearable devices is incompatible with current physical activity recommendations. Without adjustment, people will erroneously form the view that they are exceeding recommendations by several fold. A more appropriate target from self-monitoring that accounts for normal moderate-to-vigorous lifestyle activities is similar to 1000 minutes per week, which represents similar to 15% of waking time. (C) 2016 The Authors. Published by Elsevier Inc.
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