Associations of sedentary behavior bouts with community-dwelling older adults' physical function
Wilson, Jason J. (Ulster University)
McMullan, Ilona (Ulster University)
Blackburn, Nicole E. (Ulster University)
Skjødt, Mathias (Syddansk Universitet)
Caserotti, Paolo (Syddansk Universitet)
Giné-Garriga, Maria (Universitat Ramon Llull)
Farche, Ana Claudia (Universitat Ramon Llull)
Klenk, Jochen (Universität Ulm)
Dallmeier, Dhayana (Universität Ulm)
Deidda, Manuela (University of Glasgow)
Roqué i Figuls, Marta (Universitat Autònoma de Barcelona. Fundació Salut i Envelliment UAB)
Tully, Mark (Ulster University)

Date:	2021
Abstract:	The study aim was to explore associations between sedentary behavior (SB) bouts and physical function in 1360 community-dwelling older adults (≥65 years old). SB was measured using an ActiGraph wGT3X + accelerometer for seven consecutive days at the dominant hip and processed accordingly. Various SB bout lengths were assessed including: 1- to 9-minutes; 10- to 29-minutes; 30- to 59-minutes; and ≥60-minutes, as well as maximum time spent in a SB bout. Total SB time was adjusted for within the SB bout variables used (percentage SB time in the SB bout length and number of SB bouts per total SB hour). Physical function was assessed using the 2-minute walk test (2MWT), 5-times sit-to-stand (chair stand) test, and unipedal stance test (UST). Hierarchical linear regression models were utilized. Covariates such as moderate-vigorous physical activity (MVPA), demographic and health characteristics were controlled for. Lower percentage time spent in ≥60-minute SB bouts was significantly (P <. 05) associated with longer 2MWT distance while lower numbers of ≥60-minute SB bouts were associated with longer 2MWT distance, shorter chair stand time and longer UST time. There were mixed associations with physical function for 10- to 29-minute SB bouts. In a large cohort of European older adults, prolonged SB bouts lasting ≥60-minutes appear to be associated with reduced physical function after controlling for MVPA and numerous other important covariates. Besides reducing SB levels, these findings suggest there is a need to regularly interrupt prolonged SB to improve physical function in older adults.
Grants:	European Commission 634270
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Accelerometers ; Older adults ; Physical function ; Sedentary behavior
Published in:	Scandinavian Journal of Medicine and Science in Sports, Vol. 31 Núm. 1 (january 2021) , p. 153-162, ISSN 1600-0838

DOI: 10.1111/sms.13827
PMID: 32945566

10 p, 182.6 KB

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