{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T04:24:10Z","timestamp":1775535850100,"version":"3.50.1"},"reference-count":32,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2023,2,8]],"date-time":"2023-02-08T00:00:00Z","timestamp":1675814400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"name":"Data Science and Applied Technology and Clinical Research Cores"},{"DOI":"10.13039\/100010512","name":"Claude D.  Pepper Older Americans Independence Center","doi-asserted-by":"publisher","award":["P30AG028740"],"award-info":[{"award-number":["P30AG028740"]}],"id":[{"id":"10.13039\/100010512","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,8,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>In contrast to dual-energy x-ray absorptiometry (DXA), the D3-creatine (D3Cr) dilution method provides a direct measure of skeletal muscle mass and in a cohort of older men has been strongly associated with health-related outcomes. However, sensitivity to detect changes in D3Cr-derived muscle mass due to an intervention is limited.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Twenty-one older adults (\u226570\u00a0years) with low-to-moderate physical function were randomized to a 15-week high-intensity strength training (ST) or a health education (HE) group. Full-body progressive intensity ST was performed 3\u00a0days per week.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>The mean age was 82.1\u00a0years, with 64% females. After 15 weeks, both D3Cr muscle mass (MM; 2.29\u00a0kg; 95% CI: 0.22, 4.36) and DXA appendicular lean mass (ALM; 1.04\u00a0kg; 95% CI: 0.31, 1.77) were greater in ST group compared to HE. Baseline correlations between D3Cr MM and DXA ALM (r\u00a0=\u00a00.79; 95% CI: 0.53, 0.92) or total lean body mass (LBM; r\u00a0=\u00a00.79; 95% CI: 0.52, 0.91) were high. However, longitudinal changes in D3Cr MM were weakly correlated with changes in DXA ALM (r\u00a0=\u00a00.19; 95% CI: \u22120.35, 0.64) and LBM (r\u00a0=\u00a00.40; 95% CI: \u22120.13, 0.76). More participants showed positive response rates, defined as a &amp;gt;5% increase from baseline, with D3Cr MM (80%) than DXA measures (14%\u201343%).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>A progressive ST intervention in low-functioning older adults increased D3Cr MM and DXA ALM. These data suggest that the D3Cr dilution is potentially sensitive to detect changes in muscle mass in response to resistance exercise training. These results are preliminary and could be used for planning larger trials to replicate these results.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/gerona\/glad047","type":"journal-article","created":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T22:17:56Z","timestamp":1675721876000},"page":"1591-1596","source":"Crossref","is-referenced-by-count":8,"title":["Comparing D3-Creatine Dilution and Dual-Energy X-ray Absorptiometry Muscle Mass Responses to Strength Training in Low-Functioning Older Adults"],"prefix":"10.1093","volume":"78","author":[{"given":"Anoop T","family":"Balachandran","sequence":"first","affiliation":[{"name":"Department of Family, Nutrition, and Exercise Sciences, Queens College, The City University of New York , Flushing, New York , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"William\u00a0J","family":"Evans","sequence":"additional","affiliation":[{"name":"Department of Nutrition Sciences and Toxicology, University of California 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California , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marc\u00a0K","family":"Hellerstein","sequence":"additional","affiliation":[{"name":"Department of Nutrition Sciences and Toxicology, University of California , Berkeley, California , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peihua","family":"Qiu","sequence":"additional","affiliation":[{"name":"Department of Biostatistics, University of Florida , Gainesville, Florida, \u00a0 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Todd","family":"Manini","sequence":"additional","affiliation":[{"name":"Department of Aging and Geriatric Research, College of Medicine, University of Florida , Gainesville, Florida , 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