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Open AccessArticle

May Young Elite Cyclists Have Less Efficient Bone Metabolism?

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Departamento de Expresión Musical, Plástica y Corporal, Facultad de Ciencias de la Salud y del Deporte, Universidad de Zaragoza, Huesca, C/Ronda Misericordia, 5, 22001 Huesca, Spain
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Department of Functional Biology, Universidad de Oviedo, Campus del Cristo B. Julián Clavería s/n, 33006 Asturias, Spain
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GENUD (Growth, Exercise, NUtrition and Development) Research Group, Universidad de Zaragoza, 50009 Zaragoza, Spain
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Department of Physiatry and Nursing, Faculty of Health and Sport Sciences (FCSD), University of Zaragoza, Ronda Misericordia 5, 22001 Huesca, Spain
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Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBERObn), 28029 Madrid, Spain
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Instituto Agroalimentario de Aragón (IA2), 50013 Zaragoza, Spain
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Centro Universitario de la Defensa, 50090 Zaragoza, Spain
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Department of Physiatry and Nursing, Faculty of Health Sciences, University of Zaragoza, Calle Domingo Miral, s/n, 50009 Zaragoza, Spain
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Author to whom correspondence should be addressed.
Nutrients 2019, 11(5), 1178; https://doi.org/10.3390/nu11051178
Received: 10 April 2019 / Revised: 16 May 2019 / Accepted: 21 May 2019 / Published: 26 May 2019
(This article belongs to the Special Issue Calcium, Vitamin D and Health)
The purpose of this work was to describe changes in metabolic activity in the bones of young male competitive cyclists (CYC) as compared with age-matched controls (CON) over a one-year period of study. Eight adolescent male cyclists aged between fourteen and twenty, and eight age-matched controls participated in this longitudinal study. Serum osteocalcin (OC), amino-terminal propeptide of type I procollagen (PINP), beta-isomerized C-telopeptides (β-CTx) and plasma 25 hydroxyvitamin D [25(OH)D], were investigated by an electrogenerated chemiluminescence immunoassay. Analysis of variance revealed no significant differences in formation and resorption markers between cyclists and controls. Within the groups, both CYC and CON showed decreased OC at −30% and −24%, respectively, and PINP where the figures were −28% and −30% respectively (all p < 0.05). However, only the CYC group showed a decrease in [25(OH)D], lower by 11% (p < 0.05). The similarity in the concentrations of markers in cyclists and controls seems to indicate that cycling does not modify the process of bone remodeling. The decrease in vitamin D in cyclists might be detrimental to their future bone health. View Full-Text
Keywords: cyclists; adolescence; bone turnover; osteocalcin; vitamin D cyclists; adolescence; bone turnover; osteocalcin; vitamin D
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Rapún-López, M.; Olmedillas, H.; Gonzalez-Agüero, A.; Gomez-Cabello, A.; Pradas de la Fuente, F.; Moreno, L.A.; Casajús, J.A.; Vicente-Rodríguez, G. May Young Elite Cyclists Have Less Efficient Bone Metabolism? Nutrients 2019, 11, 1178.

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