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However, the impact of sedentary behavior, standing, and physical activity on sleep duration and quality remains under-explored in this population. Therefore, this study examined longitudinal associations of sedentary behavior, standing, and physical activity with sleep outcomes up to 5\u00a0years post-treatment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A prospective cohort study was conducted among 401 survivors of stage I-III CRC, with repeated measures up to 60 months post-treatment. Thigh-worn accelerometers were used to measure sedentary time (per 2h\/day), standing (per 1h\/day), and various levels of physical activity (per 1h\/day). Sleep duration (h\/night) and variability (0%\u2013100%; higher variability equals more sleep disruption) were determined from self-reported sleep times. Sleep quality and insomnia symptoms were assessed using the PSQI and EORTC questionnaires, respectively, where higher scores indicated worsened symptoms. Longitudinal associations were analyzed using confounder-adjusted linear mixed models.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Total mean sedentary time was 10.3 \u00b1 1.8\u00a0h\/day, mean standing time was 2.9 \u00b1 1.2\u00a0h\/day, mean total physical activity was 1.5 \u00b1 0.6\u00a0h\/day, and mean sleep duration was 8.7 \u00b1 1.0 h\/night at 6\u00a0weeks post-treatment. More sedentary behavior was longitudinally associated with a shorter sleep duration (\u03b2 = \u22120.28; 95%CI = \u22120.35, \u22120.21). More standing was associated with a shorter sleep duration (\u03b2 = \u22120.21; 95%CI = \u22120.25, \u22120.16), higher sleep variability (\u03b2 = 0.29%; 95%CI = 0.03, 0.55), improved sleep quality (\u03b2 = \u22120.24; 95%CI = \u22120.43, \u22120.04), and reduced insomnia symptoms (\u03b2 = \u22122.00; 95%CI = \u22123.27, \u22120.72). More total physical activity was associated with a shorter sleep duration (\u03b2 = \u22120.31; 95%CI = \u22120.41, \u22120.21) and higher sleep variability (\u03b2 = 0.59%; 95%CI = 0.11, 1.10). More moderate-to-vigorous physical activity was associated with a shorter sleep duration (\u03b2 = \u22120.04; 95%CI = \u22120.07, \u22120.00) and reduced insomnia symptoms (\u03b2 = \u22121.74; 95%CI = \u22122.69, \u22120.79).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Our findings suggest that physical (in)activity and standing are relevant for sleep-related symptoms in CRC survivors. Future studies should examine whether substituting sedentary behavior with standing and\/or physical activity may alleviate sleep-related symptoms in CRC survivors.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10732748251397676","type":"journal-article","created":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T09:19:41Z","timestamp":1763111981000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Longitudinal Associations of Sedentary Behavior and Physical Activity With Sleep Duration and Quality in Individuals Living With and Beyond Colorectal Cancer"],"prefix":"10.1177","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-3893-5525","authenticated-orcid":false,"given":"Koen G.","family":"Frenken","sequence":"first","affiliation":[{"name":"Maastricht University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laurien M.","family":"Buffart","sequence":"additional","affiliation":[{"name":"Radboud University Medical Center"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martijn","family":"Bours","sequence":"additional","affiliation":[{"name":"Maastricht University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"St\u00e9phanie O.","family":"Breukink","sequence":"additional","affiliation":[{"name":"Maastricht University Medical Centre+"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maryska","family":"Janssen-Heijnen","sequence":"additional","affiliation":[{"name":"Maastricht University"},{"name":"VieCuri Medical Centre"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joop","family":"Konsten","sequence":"additional","affiliation":[{"name":"VieCuri Medical Centre"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric T. 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