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While we have ample evidence that recreational physical activity influences brain health, the contributions of other daily activities are less understood. In particular, the associations between household physical activity and brain health in older adults is underexplored. The purpose of this study was to identify associations between household physical activity, brain volume, and cognition in a sample of cognitively unimpaired older adults.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We report data from 66 cognitively unimpaired older adults (71\u2009\u00b1\u20094\u2009years) who participated in a health evaluation, cognitive assessment, and structural brain imaging. Physical activity was assessed using the Phone-FITT questionnaire and separated into household and recreational physical activity. We quantified whole brain volume, gray matter volume, and white matter volume, and assessed cognitive performance in four domains: memory, working memory\/attention, processing speed, and executive function. Associations between physical activity, brain volume, and cognition were investigated in an omnibus approach using two multivariate analysis of variance (MANOVA) models. The first model assessed the associations between physical activity and brain volume adjusting for age, sex, Framingham Risk score (FRS) and intracranial volume. The second model assessed the associations between physical activity and overall cognitive performance adjusting for age, sex, FRS and education. Post hoc regression analyses were conducted to investigate significant MANOVA results. We also conducted further regression analyses to investigate associations with hippocampal and frontal lobe volume.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Household, but not recreational, physical activity was positively associated with brain volume measurements (\n                      <jats:italic>F<\/jats:italic>\n                      \u2009=\u20093.07,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u2009.035), specifically gray matter volume (t\u2009=\u20092.51,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u2009.015). Further exploratory analyses identified that household physical activity was associated with hippocampal (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u2009.015) and frontal lobe (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u2009.010) volume. No significant relationships were observed between household or recreational physical activity and cognition.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Time spent engaging in household physical activity was positively associated with brain volume, specifically gray matter volume, in older adults. Highlighting the benefits associated with household chores may motivate older adults to be more active by providing a more attainable, low risk form of physical activity.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12877-021-02054-8","type":"journal-article","created":{"date-parts":[[2021,2,5]],"date-time":"2021-02-05T07:09:02Z","timestamp":1612508942000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["Household physical activity is positively associated with gray matter volume in older adults"],"prefix":"10.1186","volume":"21","author":[{"given":"Noah D.","family":"Koblinsky","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liesel-Ann C.","family":"Meusel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carol E.","family":"Greenwood","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole D.","family":"Anderson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,2,5]]},"reference":[{"key":"2054_CR1","volume-title":"World Alzheimer report 2015 - the global impact of dementia: an analysis of prevalence, incidence, cost and trends","author":"MJ Prince","year":"2015","unstructured":"Prince MJ, Wimo A, Guerchet MM, Ali GC, Wu YT, Prina M. 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