Cognitive Trajectories and Subsequent Accelerometer-Measured Movement Behavior in Older Adults

Are long-term cognitive trajectories associated with how older adults later allocate daily time between physical activity, sedentary behavior, and sleep?In this UK-based cohort study of 2529 adults aged 50 years or older, those with less favorable memory trajectories over 17 years later spent significantly less time being physically active, with more sedentary time, equivalent to 1.6 fewer hours of light activity per week overall, or 2.3 fewer hours for individuals aged older than 70 years. Differences in sleep time were minor.These findings suggest that in later life, engaging in less physical activity and more sedentary time may partly reflect cognitive decline.

Corresponding Author: Mikaela Bloomberg, PhD, UCL Institute of Epidemiology and Health Care, 1-19 Torrington Pl, London WC1E 7HB, United Kingdom (mikaela.bloomberg.19@ucl.ac.uk).

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