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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparisons of physical activity, adipokines, vitamin D status and dietary vitamin D intake among adolescents

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Giudici, K. V. ; Fisberg, R. M. ; Marchioni, D. M. ; Martini, L. A.
Total Authors: 4
Document type: Journal article
Source: JOURNAL OF HUMAN NUTRITION AND DIETETICS; v. 30, n. 3, p. 369-377, JUN 2017.
Web of Science Citations: 2

BackgroundConsidering that lifestyle and diet are key factors responsible for the increases in adiposity in youth, it is important to understand how vitamin D, adipokines and markers of glucose metabolism are related to physical activity level (PAL) during growth. The present study aimed to investigate associations between physical activity level, adiponectin/leptin ratio, vitamin D status and dietary vitamin D intake among adolescents. MethodsA cross-sectional study was conducted with adolescents aged 14-18 years old who were living in SAo Paulo, Brazil. Serum 25 hydroxyvitamin D {[}25(OH)D], adiponectin (A), leptin (L), glucose and insulin were obtained after 12 h of fasting. Dietary calcium and vitamin D intake were measured by 24-h food record, as repeated in 62.6% of the sample. PAL was measured by the International Physical Activity Questionnaire (IPAQ). Pearson's chi-square test, Pearson correlation and linear regression analysis were performed. ResultsA total of 198 subjects, mean (SD) age 16.3 (1.4) years, 51% male, were enrolled in the study. Some 9% of participants were sedentary, 22% were insufficiently active (IA), 51% were active and 18% were very active (VA). The A/L ratio was lower among sedentary/IA subjects {[}2.2 (4.0) versus 5.6 (12.3); P = 0.01] compared to active/VA subjects. PAL was not associated with vitamin D status or markers of glucose metabolism. Serum 25(OH)D positively associated with vitamin D intake, after adjusting for sex, sun exposure and season of the year in regression analysis (partial r(2)=0.026, P = 0.02). ConclusionsLow PAL was associated with a lower A/L ratio. Vitamin D status was not associated with sun exposure habits, although it was positively correlated with vitamin D intake. (AU)

FAPESP's process: 12/11061-8 - Adipose tissue and bone: metabolic pathway between vitamin D, osteocalcin and adipokines in adolescents
Grantee:Lígia Araújo Martini
Support type: Regular Research Grants
FAPESP's process: 11/22768-2 - Relationship between fat mass and bone: metabolic interaction between vitamin D, vitamin D receptor genotype, osteocalcin and leptin in adolescentes
Grantee:Kelly Virecoulon Giudici
Support type: Scholarships in Brazil - Doctorate (Direct)