The descriptive epidemiology of accelerometer-measured physical activity in older adults
International Journal of Behavioral Nutrition and Physical Activity
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Berkemeyer, K., Wijndaele, K., White, T., Cooper, A., Luben, R., Westgate, K., Griffin, S., et al. (2016). The descriptive epidemiology of accelerometer-measured physical activity in older adults. International Journal of Behavioral Nutrition and Physical Activity, 13 (2)https://doi.org/10.1186/s12966-015-0316-z
Background: Objectively measured physical activity between older individuals and between populations has been poorly described. We aimed to describe and compare the variation in accelerometry data in older UK (EPIC-Norfolk) and American (NHANES) adults. Methods: Physical activity was measured by uniaxial accelerometry in 4,052 UK (49-91 years) and 3459 US older adults (49-85 years). We summarized physical activity as volume (average counts/minute), its underlying intensity distribution, and as time spent <100 counts/minute, ≥809 counts/minute and ≥2020 counts/minute both for total activity and that undertaken in ≥10-minute bouts. Results: In EPIC-Norfolk 65% of wear-time was spent at <100 counts/minute and 20% spent in the range 100-500 counts/minute. Only 4.1% of this cohort accumulated more than 30min/day of activity above 2020 counts/minute in 10-minute bouts. If a cut-point of >809 counts/minute is used 18.7% of people reached the 30 minutes/day threshold. By comparison, 2.5% and 9.5% of American older adults accumulated activity at these levels, respectively. Conclusion: As assessed by objectively measured physical activity, the majority of older adults in this UK study did not meet current activity guidelines. Older adults in the UK were more active overall, but also spent more time being sedentary than US adults.
accelerometry, activity intensity distribution, older adults, guidelines
This work was supported by programme grants from the Medical Research Council [G9502233; G0401527] and Cancer Research UK [C864/A8257]. A grant from Research into Ageing  funded the 3rd health check clinic. KW is supported by a British Heart Foundation Intermediate Basic Science Research Fellowship [FS/12/58/29709], and AJMC, SJG, NJW, and SB are supported by MRC programme grants [MC_UU_12015/3 and MC_UU_12015/4].
British Heart Foundation (FS/12/58/29709)
Medical Research Council (MC_U106179471)
Medical Research Council (MC_U106179474)
Cancer Research UK (A8257)
External DOI: https://doi.org/10.1186/s12966-015-0316-z
This record's URL: https://www.repository.cam.ac.uk/handle/1810/252873
Creative Commons Attribution 4.0 International License
Licence URL: http://creativecommons.org/licenses/by/4.0/