{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T17:51:03Z","timestamp":1791568263404,"version":"4.3.4"},"reference-count":32,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:00:00Z","timestamp":1791331200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100000049","name":"National Institute on Aging","doi-asserted-by":"publisher","award":["R56AG064952"],"award-info":[{"award-number":["R56AG064952"]}],"id":[{"id":"10.13039\/100000049","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000049","name":"National Institute on Aging","doi-asserted-by":"publisher","award":["RF1AG083878"],"award-info":[{"award-number":["RF1AG083878"]}],"id":[{"id":"10.13039\/100000049","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Health Psychol"],"abstract":"<jats:p>\n                    This study examined how loneliness relates to physical activity at between-person and within-person (daily and momentary) levels. Adults in committed relationships (\n                    <jats:italic toggle=\"yes\">n<\/jats:italic>\n                    \u2009=\u2009291; ages 40\u201370) completed a dispositional loneliness measure and participated in an 8-day ecological momentary assessment paired with accelerometry. Loneliness was assessed three times daily via self-report, with partners providing end-of-day ratings of participants\u2019 loneliness. Physical activity indices (e.g. active time) were derived for the full 8-day period, for each day, and for 20\u201360-minute windows before and after each momentary prompt. Dispositional loneliness was unrelated to mean-level physical activity. At the day-level, no accelerometer-based measures were associated with partner-rated evening loneliness. At the momentary-level, physical activity before each prompt was unrelated to self-reported loneliness, and momentary loneliness did not predict later activity. Overall, loneliness was unrelated to physical activity across between-person, daily, and momentary analyses. Results may reflect a true null effect or sample characteristics.\n                  <\/jats:p>","DOI":"10.1177\/13591053261490849","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T04:51:18Z","timestamp":1791435078000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Loneliness and physical activity: Findings from an ecological momentary assessment and accelerometry study"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7370-8443","authenticated-orcid":false,"given":"Martina","family":"Luchetti","sequence":"first","affiliation":[{"name":"Florida State University College of Medicine, Tallahassee, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0160-727X","authenticated-orcid":false,"given":"Tiia","family":"Kek\u00e4l\u00e4inen","sequence":"additional","affiliation":[{"name":"Laurea University of Applied Sciences, Vantaa, Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8029-8809","authenticated-orcid":false,"given":"Yannick","family":"Stephan","sequence":"additional","affiliation":[{"name":"Euromov, University of Montpellier, Montpellier, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8629-4422","authenticated-orcid":false,"given":"Selin","family":"Karakose","sequence":"additional","affiliation":[{"name":"Florida State University College of Medicine, Tallahassee, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5799-8885","authenticated-orcid":false,"given":"Antonio","family":"Terracciano","sequence":"additional","affiliation":[{"name":"Florida State University College of Medicine, Tallahassee, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1824-8974","authenticated-orcid":false,"given":"Angelina R.","family":"Sutin","sequence":"additional","affiliation":[{"name":"Florida State University College of Medicine, Tallahassee, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,10,7]]},"reference":[{"key":"e_1_3_5_2_1","doi-asserted-by":"crossref","unstructured":"Broen T Choi Y Zambrano Garza E et al. 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