{"doi":"10.1093/gerona/glac149","title":"Myelin and Physical Activity in Older Adults With Cerebral Small Vessel Disease and Mild Cognitive Impairment","abstract":"<jats:title>Abstract</jats:title><jats:sec><jats:title>Background</jats:title><jats:p>Myelin loss is a feature of cerebral small vessel disease (cSVD). Although physical activity levels may exert protective effects over cSVD pathology, its specific relationship with myelin content in people living with the cSVD is unknown. Thus, we investigated whether physical activity levels are associated with myelin in community-dwelling older adults with cSVD and mild cognitive impairment.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Cross-sectional data from 102 individuals with cSVD and mild cognitive impairment were analyzed (mean age [SD] = 74.7 years [5.5], 63.7% female). Myelin was measured using a magnetic resonance gradient and spin echo sequence. Physical activity was estimated using the Physical Activity Scale for the Elderly. Hierarchical regression models adjusting for total intracranial volume, age, sex, body mass index, and education were conducted to determine the associations between myelin content and physical activity. Significant models were further adjusted for white matter hyperintensity volume.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>In adjusted models, greater physical activity was linked to higher myelin content in the whole-brain white matter (R2change = .04, p = .048). Greater physical activity was also associated with myelin content in the sagittal stratum (R2change = .08, p = .004), anterior corona radiata (R2change = .04, p = .049), and genu of the corpus callosum (R2change = .05, p = .018). Adjusting for white matter hyperintensity volume did not change any of these associations.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>Physical activity may be a strategy to maintain myelin in older adults with cSVD and mild cognitive impairment. Future randomized controlled trials of exercise are needed to determine whether exercise increases myelin content.</jats:p></jats:sec>","journal":"The Journals of Gerontology: Series A","year":2023,"id":615408,"datarank":0.48283137373023016,"base_score":3.2188758248682006,"endowment":3.2188758248682006,"self_citation_contribution":0.48283137373023016,"citation_network_contribution":0.0,"self_endowment_contribution":0.48283137373023016,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":24,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":390813,"name":"Elizabeth Dao","orcid":"0009-0004-4981-6307","position":1,"is_corresponding":false},{"id":1497929,"name":"Chun Liang Hsu","orcid":"0000-0003-2090-1001","position":2,"is_corresponding":false},{"id":1586209,"name":"Roger C Tam","orcid":null,"position":3,"is_corresponding":false},{"id":353975,"name":"Kevin Lam","orcid":"0000-0001-7073-0429","position":4,"is_corresponding":false},{"id":1586210,"name":"Walid Alkeridy","orcid":null,"position":5,"is_corresponding":false},{"id":478506,"name":"Cornelia Laule","orcid":"0000-0002-9785-6918","position":6,"is_corresponding":false},{"id":1586211,"name":"Irene M Vavasour","orcid":null,"position":7,"is_corresponding":false},{"id":1586212,"name":"Ryan G Stein","orcid":null,"position":8,"is_corresponding":false},{"id":385343,"name":"Teresa Liu‐Ambrose","orcid":"0000-0002-8297-5308","position":9,"is_corresponding":false},{"id":1586208,"name":"Nárlon C Boa Sorte Silva","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Myelin and Physical Activity in Older Adults With Cerebral Small Vessel Disease and Mild Cognitive Impairment","abstract":"<jats:title>Abstract</jats:title><jats:sec><jats:title>Background</jats:title><jats:p>Myelin loss is a feature of cerebral small vessel disease (cSVD). Although physical activity levels may exert protective effects over cSVD pathology, its specific relationship with myelin content in people living with the cSVD is unknown. Thus, we investigated whether physical activity levels are associated with myelin in community-dwelling older adults with cSVD and mild cognitive impairment.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Cross-sectional data from 102 individuals with cSVD and mild cognitive impairment were analyzed (mean age [SD] = 74.7 years [5.5], 63.7% female). Myelin was measured using a magnetic resonance gradient and spin echo sequence. Physical activity was estimated using the Physical Activity Scale for the Elderly. Hierarchical regression models adjusting for total intracranial volume, age, sex, body mass index, and education were conducted to determine the associations between myelin content and physical activity. Significant models were further adjusted for white matter hyperintensity volume.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>In adjusted models, greater physical activity was linked to higher myelin content in the whole-brain white matter (R2change = .04, p = .048). Greater physical activity was also associated with myelin content in the sagittal stratum (R2change = .08, p = .004), anterior corona radiata (R2change = .04, p = .049), and genu of the corpus callosum (R2change = .05, p = .018). Adjusting for white matter hyperintensity volume did not change any of these associations.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>Physical activity may be a strategy to maintain myelin in older adults with cSVD and mild cognitive impairment. Future randomized controlled trials of exercise are needed to determine whether exercise increases myelin content.</jats:p></jats:sec>","is_dataset_classified":null,"base_score":3.2188758248682006,"endowment":3.2188758248682006,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"35876839","pmcid":null,"openalex_id":"https://openalex.org/W4287447599","authors":[],"funders":[{"funder_name":"Alzheimer's Society","grant_id":"","title":null},{"funder_name":"Alzheimer Society Research Program","grant_id":"","title":null},{"funder_name":"Heart and Stroke Foundation of Canada","grant_id":"","title":null},{"funder_name":"CIHR","grant_id":"","title":null}],"total_grants":4,"fwci":2.7252,"citation_percentile":0.91470478,"influential_citations":0,"citation_trend":[{"year":2022,"count":1},{"year":2023,"count":6},{"year":2024,"count":6},{"year":2025,"count":7},{"year":2026,"count":4}],"oa_status":"closed","license":"https://academic.oup.com/pages/standard-publication-reuse-rights","oa_locations":[{"url":"https://academic.oup.com/biomedgerontology/advance-article-pdf/doi/10.1093/gerona/glac149/45583957/glac149.pdf","host_type":"publisher"},{"url":"https://academic.oup.com/biomedgerontology/article-pdf/78/3/545/49378648/glac149.pdf","host_type":"publisher"},{"url":"https://doi.org/10.1093/gerona/glac149","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/35876839","host_type":"repository"}],"fields_of_study":["Multiple Sclerosis Research Studies","Dementia and Cognitive Impairment Research","Neurogenesis and neuroplasticity mechanisms"],"mesh_terms":["Aged","Cross-Sectional Studies","Female","Humans","Magnetic Resonance Imaging","Male","Myelin Sheath","Cerebral Small Vessel Diseases","Cognitive Dysfunction"],"keywords":["Myelin","Hyperintensity","White matter","Corpus callosum","Psychology","Multiple sclerosis","Magnetic resonance imaging","Cognitive decline","Cognition","Internal medicine","Medicine","Physiology","Pathology","Disease","Neuroscience","Dementia","Central nervous system","Psychiatry","Radiology","Cerebrovascular disease","Lifestyle","Functional Decline","Cerebral White Matter"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Good health and well-being"},{"sdg_number":0,"sdg_label":"Quality Education"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-02T19:55:39.318906Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}