517aaf404676325ac4912a0fdea20fb2 jal-02-00006.pdf 4e9b43b531b57c727d72d0c9fd873db518e973e3 jal-02-00006.pdf 4143a6b3628ec9cd6a709279b124e67931f1852b2faf8fb9ec4472cd64894dc2 jal-02-00006.pdf Title: The Association of Physical Activity Fragmentation with Physical Function in Older Adults: Analysis from the SITLESS Study Subject: The distribution of physical activity bouts through the day may provide useful information for assessing the impacts of interventions on aspects such as physical function. This study aimed to investigate the associations between physical activity fragmentation, tested using different minimum physical activity bout lengths, with physical function in older adults. The SITLESS project recruited 1360 community-dwelling participants from four European countries (65 years old). Physical activity fragmentation was represented as the active-to-sedentary transition probability (ASTP), the reciprocal of the average physical activity bout duration measured using ActiGraph wGT3X+ accelerometers. Four minimum bout lengths were utilised to calculate the ASTP: 10-s, 60-s, 120-s and 300-s. Physical function was assessed using the 2-min walk test (2MWT) and the composite score from the Short Physical Performance Battery (SPPB) test. Linear regression analyses, after adjusting for relevant covariates, were used to assess cross-sectional associations. After adjustment for relevant covariates, lower ASTP using 10-s bouts were associated with longer 2MWT distances and higher SPPB scores. Lower ASTP using 120-s bouts and 300-s bouts were associated with longer 2MWT distances but not the SPPB. Less fragmented physical activity patterns appeared to be associated with better physical function in community-dwelling older adults.+20pt Keywords: older adult; accelerometry; physical activity; fragmentation; physical function Author: Jason J. Wilson, Ilona McMullan, Nicole E. Blackburn, Natalie Klempel, Javier Jerez-Roig, Guillermo R. Oviedo, Jochen Klenk, Dhayana Dallmeier, Laura Coll-Planas, Emma McIntosh, Mathias Skjødt, Paolo Caserotti and Mark A. Tully Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Thu Mar 3 15:55:15 2022 CET ModDate: Thu Mar 3 15:59:01 2022 CET Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 11 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 300223 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- NKYYNY+VnURWPalladioL Type 1 Custom yes yes no 10 0 HINODI+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 DVCDJL+URWPalladioL-Roma Type 1 Custom yes yes no 20 0 KAFDSC+URWPalladioL-Ital Type 1 Custom yes yes no 24 0 GQWIGS+CMSY10 Type 1 Builtin yes yes no 28 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 36 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 40 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 44 0 ZYYJXI+EURB10 Type 1 Builtin yes yes no 93 0 WBVKDJ+URWPalladioL-BoldItal Type 1 Custom yes yes no 97 0 NXRFTX+CMBSY10 Type 1 Builtin yes yes no 101 0 LWLIVD+EURM10 Type 1 Builtin yes yes no 105 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2025-02-25 02:09:45 CET RepresentationInformation: jal-02-00006.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2025-02-24 12:11:21 CET Size: 300223 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 263 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Materials and Methods Destination: section.2 Children: Item: Title: Participants and Procedures Destination: subsection.2.1 Item: Title: Physical Activity and Sedentary Behaviour Assessment Destination: subsection.2.2 Item: Title: Physical Function Destination: subsection.2.3 Item: Title: Covariates Destination: subsection.2.4 Item: Title: Statistical Analysis Destination: subsection.2.5 Item: Title: Results Destination: section.3 Children: Item: Title: Descriptive Data Destination: subsection.3.1 Item: Title: Regression Analysis Destination: subsection.3.2 Item: Title: Discussion Destination: section.4 Item: Title: Conclusions Destination: section.5 Item: Title: References Destination: section.5 Info: Title: The Association of Physical Activity Fragmentation with Physical Function in Older Adults: Analysis from the SITLESS Study Author: Jason J. Wilson, Ilona McMullan, Nicole E. Blackburn, Natalie Klempel, Javier Jerez-Roig, Guillermo R. Oviedo, Jochen Klenk, Dhayana Dallmeier, Laura Coll-Planas, Emma McIntosh, Mathias Skjødt, Paolo Caserotti and Mark A. Tully Subject: The distribution of physical activity bouts through the day may provide useful information for assessing the impacts of interventions on aspects such as physical function. This study aimed to investigate the associations between physical activity fragmentation, tested using different minimum physical activity bout lengths, with physical function in older adults. The SITLESS project recruited 1360 community-dwelling participants from four European countries (65 years old). Physical activity fragmentation was represented as the active-to-sedentary transition probability (ASTP), the reciprocal of the average physical activity bout duration measured using ActiGraph wGT3X+ accelerometers. Four minimum bout lengths were utilised to calculate the ASTP: 10-s, 60-s, 120-s and 300-s. Physical function was assessed using the 2-min walk test (2MWT) and the composite score from the Short Physical Performance Battery (SPPB) test. Linear regression analyses, after adjusting for relevant covariates, were used to assess cross-sectional associations. After adjustment for relevant covariates, lower ASTP using 10-s bouts were associated with longer 2MWT distances and higher SPPB scores. Lower ASTP using 120-s bouts and 300-s bouts were associated with longer 2MWT distances but not the SPPB. 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