131838 20251113150201.0 doi 10.1007/s11657-018-0415-y sideral 104529 ART-2018-104529 eng Olmedillas, H. Bone metabolism markers and vitamin D in adolescent cyclists 2018 Access copy available to the general public Unrestricted Summary: This study aimed to describe bone metabolic activity in adolescent competitive cyclists compared to age-matched controls. The main result is that younger subjects present a higher bone turnover than the older ones. Moreover, cyclists under the age of 17 have higher scores on all markers than age-matched controls. Purpose: The purpose of this study was to describe bone metabolic activity in adolescent competitive cyclists compared to age-matched controls. Methods: Twenty-two male adolescent cyclists between 14 and 20 years (y) and 20 age-matched controls participated in this study. Serum osteocalcin (OC), aminoterminal propeptide of type I procollagen (PINP), and ß-isomerized C-telopeptides (ß-CTX) were analyzed by electrochemiluminescence immunoassay (ECLIA); plasma 25 hydroxyvitamin D [25(OH)D] was analyzed by enzyme-linked immunosorbent assay (ELISA). Results: Analysis of variance revealed no significant differences in bone metabolism markers and vitamin D between cyclists and controls. Cyclists over 17 y had a significantly lower concentration in bone formation and resorption biochemical markers compared to cyclists under 17 y (all P < 0.05). Moreover, controls over 17 y presented lower concentration for PINP (P < 0.05) compared to their peers under 17 y. Comparisons between cyclists and controls under 17 y revealed higher concentrations of OC and PINP (P < 0.05) in cyclists. Group interaction by age was found for OC, PINP, and ß-CTX (P < 0.01). Cyclists over 17 y had higher concentrations of [25(OH)D] (P < 0.05) than age-matched controls. Conclusions: The present results support the idea that cycling during adolescence may be associated to a decrease in bone turnover that may affect bone health later in life. info:eu-repo/grantAgreement/ES/MEC/21-UPB20-10 info:eu-repo/grantAgreement/ES/ISCIII/DPS2008-06999 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.469 2018 ORTHOPEDICS 24 / 76 = 0.316 2018 Q2 T1 ENDOCRINOLOGY & METABOLISM 93 / 145 = 0.641 2018 Q3 T2 0.813 2018 Orthopedics and Sports Medicine 2018 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Gonzalez de Agüero, A. Universidad de Zaragoza (orcid)0000-0002-1132-5906 Rapún-López, M. Universidad de Zaragoza (orcid)0000-0002-6066-8200 Gracia-Marco, L. (orcid)0000-0002-4020-0256 Gomez-Cabello, A. Universidad de Zaragoza (orcid)0000-0001-6492-2512 Pradas de la Fuente, F. Universidad de Zaragoza (orcid)0000-0002-6829-0775 Moreno, L.A. Universidad de Zaragoza (orcid)0000-0003-0454-653X Casajús, J.A. Universidad de Zaragoza (orcid)0000-0002-7215-6931 Vicente-Rodríguez, G. Universidad de Zaragoza (orcid)0000-0002-4303-4097 3001 187 Universidad de Zaragoza Dpto. Expres.Music.Plást.Corp. Área Didáctica Expres.Corporal 1006 255 Universidad de Zaragoza Dpto. Fisiatría y Enfermería Área Enfermería 1006 245 Universidad de Zaragoza Dpto. Fisiatría y Enfermería Área Educación Física y Depor. 13, 11 (2018), [8 pp] Arch. osteoporos. Archives of osteoporosis 1862-3514 391560 http://zaguan.unizar.es/record/131838/files/texto_completo.pdf Postprint 1035424 http://zaguan.unizar.es/record/131838/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:131838 articulos driver 2025-11-13-15:00:36 ARTICLE