Wearable-device-measured physical activity and future health risk, 2020, Strain et al

Andy · Aug 17, 2020

Use of wearable devices that monitor physical activity is projected to increase more than fivefold per half-decade1. We investigated how device-based physical activity energy expenditure (PAEE) and different intensity profiles were associated with all-cause mortality.

We used a network harmonization approach to map dominant-wrist acceleration to PAEE in 96,476 UK Biobank participants (mean age 62 years, 56% female). We also calculated the fraction of PAEE accumulated from moderate-to-vigorous-intensity physical activity (MVPA).

Over the median 3.1-year follow-up period (302,526 person-years), 732 deaths were recorded. Higher PAEE was associated with a lower hazard of all-cause mortality for a constant fraction of MVPA (for example, 21% (95% confidence interval 4–35%) lower hazard for 20 versus 15 kJ kg−1 d−1 PAEE with 10% from MVPA).

Similarly, a higher MVPA fraction was associated with a lower hazard when PAEE remained constant (for example, 30% (8–47%) lower hazard when 20% versus 10% of a fixed 15 kJ kg−1 d−1 PAEE volume was from MVPA).

Our results show that higher volumes of PAEE are associated with reduced mortality rates, and achieving the same volume through higher-intensity activity is associated with greater reductions than through lower-intensity activity. The linkage of device-measured activity to energy expenditure creates a framework for using wearables for personalized prevention.
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Paywall, https://www.nature.com/articles/s41591-020-1012-3,
Sci hub, https://sci-hub.tw/10.1038/s41591-020-1012-3

Article about the study, https://mrc.ukri.org/news/browse/la...r-health-and-more-intense-activity-is-better/

MeSci · Aug 17, 2020

Not terribly with-it, but doesn't that just mean that people who are more active (for whatever reason) have less risk of dying? And isn't that bl**dy obvious? It's not necessarily that increasing activity reduces risk?

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Wearable-device-measured physical activity and future health risk, 2020, Strain et al

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Wearable-device-measured physical activity and future health risk, 2020, Strain et al

Andy Retired committee member

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