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Vitamin D, Muscle Function, and Cardiorespiratory Fitness in Adolescents From the Young Hearts Study.

Carson, E L, Pourshahidi, Kirsty, Hill, T R, Cashman, K D, Strain, JJ, Boreham, C A and Mulhern, Maria S. (2015) Vitamin D, Muscle Function, and Cardiorespiratory Fitness in Adolescents From the Young Hearts Study. The Journal of clinical endocrinology and metabolism, 100 (12). pp. 4621-8. [Journal article]

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DOI: doi: 10.1210/jc.2015-2956

Abstract

CONTEXTVitamin D insufficiency is common among the adolescent population and may have implications for health outcomes in later life. Few studies have investigated the role of vitamin D status in muscle function and cardiorespiratory fitness (CRF) during adolescence.OBJECTIVEThe aim of this study was to investigate the association between vitamin D status and fat-free mass (FFM), muscle strength, muscle power, and CRF in a representative sample of adolescents from Northern Ireland.DESIGN, SETTING, AND PARTICIPANTSThis was a cross-sectional study involving 1015 adolescents (age 12 and 15 y), who had 25-hydroxyvitamin D [25(OH)D] data available as part of the Young Hearts Study 2000.MAIN OUTCOME MEASURESThe main outcome measures of this study were FFM (kg) and FFM corrected for height [fat-free mass index; FFM (kg)/height (m(2))], muscle strength (kg), peak muscle power (kW) and VO2 max (CRF; mL/kg/min).RESULTSMultinomial regression analyses, controlling for environmental and lifestyle factors, demonstrated that boys age 15 years in the highest tertile of standardized serum 25(OH)D concentration (> 51 nmol/L) had significantly higher muscle strength (β = 3.90; P ≤ .001) compared with those in the lowest tertile (< 32 nmol/L). These results were not evident in any other age-sex group and vitamin D status was not significantly associated with muscle power or CRF in any of the four age-sex groups.CONCLUSIONThese results support a role for vitamin D in muscle function in adolescent males and suggest the need for more research in this vulnerable age group.

Item Type:Journal article
Keywords:Vitamin D; muscle function; cardiorespiratory fitness; Adolescents
Faculties and Schools:Faculty of Life and Health Sciences > School of Biomedical Sciences
Faculty of Life and Health Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute > Nutrition Innovation Centre for Food and Health (NICHE)
Biomedical Sciences Research Institute
ID Code:32821
Deposited By: Dr Kirsty Pourshahidi
Deposited On:28 Jan 2016 15:09
Last Modified:28 Jan 2016 15:09

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