{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T02:17:47Z","timestamp":1790821067189,"version":"4.1.0"},"reference-count":61,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,12,26]],"date-time":"2021-12-26T00:00:00Z","timestamp":1640476800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"EU-program Interreg SK-AT","award":["NutriAging"],"award-info":[{"award-number":["NutriAging"]}]},{"DOI":"10.13039\/501100003065","name":"University of Vienna","doi-asserted-by":"publisher","award":["Research Platform Active Ageing"],"award-info":[{"award-number":["Research Platform Active Ageing"]}],"id":[{"id":"10.13039\/501100003065","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003065","name":"University of Vienna","doi-asserted-by":"publisher","award":["Open Access Funds"],"award-info":[{"award-number":["Open Access Funds"]}],"id":[{"id":"10.13039\/501100003065","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Vitamin D status is associated with muscle strength and performance in older adults. To examine the additive effects of vitamin D3 supplementation during resistance training, 100 seniors (65\u201385 years) participated in a 16-week intervention. Besides a daily dose of 400 mg of calcium, participants received either 800 IU vitamin D3 per day (VDD), 50,000 IU vitamin D3 per month (VDM) or nothing (CON). After the initial loading phase of four weeks, all groups started a 10-week resistance training program. Assessments of 25-hydroxyvitamin D (25(OH)D) status, muscle strength endurance (30-s chair stand and arm curl tests), aerobic capacity (6-min walk test) and functional mobility (gait speed and timed up and go test) were undertaken at baseline, after four weeks and at the end of the study. 25(OH)D status significantly improved in VDD and VDM, but not in CON (time x group: p = 0.021), as 15.2% of CON, 40.0% of VDD and 61.1% of VDM reached vitamin D sufficiency (&gt;30 ng\/mL; p = 0.004). Chair stand test, arm curl test, 6-min walk test, gait speed and timed up and go test improved over the whole intervention period (p &lt; 0.05), however only chair stand and arm curl test were selectively affected by resistance training (p &lt; 0.001). Neither muscle strength endurance, nor functional mobility or aerobic capacity were modulated by vitamin D supplementation. Therefore, the mere amelioration of 25(OH)D status of older adults does not lead to an additive effect on muscular performance during RT.<\/jats:p>","DOI":"10.3390\/nu14010086","type":"journal-article","created":{"date-parts":[[2021,12,27]],"date-time":"2021-12-27T01:06:54Z","timestamp":1640567214000},"page":"86","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Effects of Vitamin D3 Supplementation and Resistance Training on 25-Hydroxyvitamin D Status and Functional Performance of Older Adults: A Randomized Placebo-Controlled Trial"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1573-7123","authenticated-orcid":false,"given":"Rudolf","family":"Aschauer","sequence":"first","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Centre for Sport Science and University Sports, University of Vienna, 1150 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2636-637X","authenticated-orcid":false,"given":"Sandra","family":"Unterberger","sequence":"additional","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Centre for Sport Science and University Sports, University of Vienna, 1150 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6952-2881","authenticated-orcid":false,"given":"Patrick A.","family":"Z\u00f6hrer","sequence":"additional","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Department of Nutritional Sciences, University of Vienna, 1090 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9750-4149","authenticated-orcid":false,"given":"Agnes","family":"Draxler","sequence":"additional","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Department of Nutritional Sciences, University of Vienna, 1090 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6762-2777","authenticated-orcid":false,"given":"Bernhard","family":"Franzke","sequence":"additional","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Department of Nutritional Sciences, University of Vienna, 1090 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva-Maria","family":"Strasser","sequence":"additional","affiliation":[{"name":"Karl Landsteiner Institute for Remobilization and Functional Health\/Institute for Physical Medicine and Rehabilitation, Kaiser Franz Joseph Hospital, Social Medical Center South, 1100 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1683-7265","authenticated-orcid":false,"given":"Karl-Heinz","family":"Wagner","sequence":"additional","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Department of Nutritional Sciences, University of Vienna, 1090 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9061-7914","authenticated-orcid":false,"given":"Barbara","family":"Wessner","sequence":"additional","affiliation":[{"name":"Research Platform Active Ageing, University of Vienna, 1090 Vienna, Austria"},{"name":"Centre for Sport Science and University Sports, University of Vienna, 1150 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1321","DOI":"10.1152\/jappl.2000.88.4.1321","article-title":"Aging of skeletal muscle: A 12-yr longitudinal study","volume":"88","author":"Frontera","year":"2000","journal-title":"J. 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