{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T03:22:30Z","timestamp":1768533750857,"version":"3.49.0"},"reference-count":61,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T00:00:00Z","timestamp":1618444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004587","name":"Instituto de Salud Carlos III","doi-asserted-by":"publisher","award":["CB12\/03\/30038"],"award-info":[{"award-number":["CB12\/03\/30038"]}],"id":[{"id":"10.13039\/501100004587","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Low vitamin D is usual; however, data are limited for elite team players. The aim was to investigate the vitamin D levels in Football Club Barcelona (FCB) first division players of six sport modalities. Ninety-five elite male players (27.3 \u00b1 4.6 y) belonging to FCB provided data for vitamin D throughout a season. In this study, 25(OH)D was measured in serum by chemiluminescent immunoassay. Outdoor\/indoor training and supplementation were also considered. Total mean 25(OH)D concentrations were 91.9 \u00b1 23.1 nmol\/L in all players, with higher mean levels among supplemented players (94.7 \u00b1 24.3 nmol\/L). Around 25% of the team players were below optimal levels (&lt;75 nmol\/L), but none were below 50 nmol\/L. Caucasian, supplemented football and handball players had the highest mean vitamin D concentrations over the whole year, whereas basketball players (indoor training) had the lowest ones. The highest rate of vitamin D insufficiency was found in spring (40%). A positive significant effect was observed for the interaction between indoor\/outdoor training and supplementation with 25(OH)D concentrations (p &lt; 0.05). Those team players training outdoors with supplementation had higher total vitamin D concentrations than those with indoors training and\/or supplementation. A positive interaction of outdoor training with supplementation exists to determine 25(OH)D concentrations in team players.<\/jats:p>","DOI":"10.3390\/nu13041311","type":"journal-article","created":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T21:35:13Z","timestamp":1618522513000},"page":"1311","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Vitamin D Status in Spanish Elite Team Sport Players"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9377-8668","authenticated-orcid":false,"given":"Jara","family":"Valtue\u00f1a","sequence":"first","affiliation":[{"name":"ImFine Research Group, Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7342-5972","authenticated-orcid":false,"given":"Raquel","family":"Aparicio-Ugarriza","sequence":"additional","affiliation":[{"name":"ImFine Research Group, Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"},{"name":"CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0540-7120","authenticated-orcid":false,"given":"Daniel","family":"Medina","sequence":"additional","affiliation":[{"name":"Medical Services FC Barcelona, 08970 Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonia","family":"Lizarraga","sequence":"additional","affiliation":[{"name":"Medical Services FC Barcelona, 08970 Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8060-3914","authenticated-orcid":false,"given":"Gil","family":"Rodas","sequence":"additional","affiliation":[{"name":"Medical Services FC Barcelona, 08970 Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7757-3235","authenticated-orcid":false,"given":"Marcela","family":"Gonz\u00e1lez-Gross","sequence":"additional","affiliation":[{"name":"ImFine Research Group, Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"},{"name":"CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8594-4294","authenticated-orcid":false,"given":"Franchek","family":"Drobnic","sequence":"additional","affiliation":[{"name":"Medical Services FC Barcelona, 08970 Barcelona, Spain"},{"name":"GIRSANE-CAR (Centre d\u2019Alt Rendiment Sant Cugat del Vall\u00e8s), 08173 Sant Cugat del Vall\u00e8s, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"755","DOI":"10.1017\/S0007114511003527","article-title":"Vitamin D status among adolescents in Europe: The Healthy Lifestyle in Europe by Nutrition in Adolescence study","volume":"107","author":"Valtuena","year":"2012","journal-title":"Br. 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