Are Reallocations between Sedentary Behaviour and Physical Activity Associated with Better Sleep in Adults Aged 55+ Years? An Isotemporal Substitution Analysis.
Physical activity has been proposed as an effective alternative treatment option for the increasing occurrence of sleep problems in older adults. Although higher physical activity levels are associated with better sleep, the association between specific physical activity intensities and sedentary behaviour (SB) with sleep remains unclear. This study examines the associations of statistically modelled time reallocations between sedentary time and different physical activity intensities with sleep outcomes using isotemporal substitution analysis. Device-measured physical activity data and both objective and subjective sleep data were collected from 439 adults aged 55+ years. Replacing 30 min of SB with moderate to vigorous intensity physical activity (MVPA) was significantly associated with an increased number of awakenings. Moreover, a reallocation of 30 min between light physical activity (LPA) and MVPA was significantly associated with increased sleep efficiency. Furthermore, reallocating 30 min of SB to LPA showed a significant association with decreased sleep efficiency. There were no significant associations of time reallocations for wake time after sleep onset, length of awakenings, and sleep quality. These results improve our understanding of the interrelationships between different intensities of movement behaviours and several aspects of sleep in older adults.
['Vanderlinden|Julie|J|', 'Biddle|Gregory J. H.|GJH|', 'Boen|Filip|F|0000-0002-5295-4776', 'van Uffelen|Jannique G Z|JGZ|']
D061725:Accelerometry D000368:Aged D003430:Cross-Sectional Studies D015444:Exercise D005260:Female D006801:Humans D008297:Male D008875:Middle Aged D057185:Sedentary Behavior D012890:Sleep D013997:Time Factors
sedentary behaviour physical activity sleep isotemporal substitution analysis older adults public health