Bidirectional associations of accelerometer-assessed physical activity and sedentary time with physical function among older English adults: the EPIC-Norfolk cohort study

Dharani Yerrakalva (), Samantha Hajna, Katrien Wijndaele, Paddy C. Dempsey, Kate Westgate, Nick Wareham, Simon J. Griffin and Soren Brage
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Dharani Yerrakalva: University of Cambridge
Samantha Hajna: University of Cambridge
Katrien Wijndaele: University of Cambridge
Paddy C. Dempsey: University of Cambridge
Kate Westgate: University of Cambridge
Nick Wareham: University of Cambridge
Simon J. Griffin: University of Cambridge
Soren Brage: University of Cambridge

European Journal of Ageing, 2022, vol. 19, issue 4, No 53, 1507-1517

Abstract: Abstract To develop healthy ageing interventions, longitudinal associations between objectively assessed physical behaviours and physical function need to be better understood. We assessed associations between accelerometer-assessed total physical activity (PA), moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), sedentary time and prolonged sedentary bout time, and clinically assessed physical function (grip strength, usual walking speed (UWS), chair stand speed) at two time-points in 3188 participants (≥ 60 years) of the EPIC-Norfolk study. Bidirectional associations were assessed using multivariable linear regression. Over an average of 6.1 years, baseline physical behaviours (greater total PA, MVPA and LPA, and less sedentary time) were associated with better subsequent walking and chair stand speed. Better baseline physical function was associated with better follow-up physical behaviours. There were no bidirectional associations between changes in physical behaviours and grip strength. Improvements in UWS were associated with improvements in all physical behaviours. Improvements in chair stand speed were associated with improvements in total PA, MVPA, and sedentary bout time. Improvements in physical behaviours were associated with improvements in UWS (3.1 cm/s/yr per 100 cpm/yr total PA, 3.6 cm/s/yr per hr/day/yr MVPA, 2.5 cm/s/yr per hr/day/yr LPA, − 2.9 cm/s/yr per hour/day/yr sedentary time, and − 1.6 cm/s/yr per hr/day/yr prolonged sedentary bout time). Only improvements in total PA, MVPA and sedentary bout time were associated with improvements in chair stand speed. In conclusion, we found bidirectional associations between changes in some physical behaviours and physical function and between baseline physical behaviours and subsequent physical function, highlighting the importance of considering the full range of physical behaviours to promote healthy ageing.

Keywords: Physical activity; Sedentary time; Physical function; Older adults (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s10433-022-00733-y

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