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Journal of Obesity
Volume 2013 (2013), Article ID 984613, 10 pages
Research Article

Physical Activity and Screen Time in Metabolically Healthy Obese Phenotypes in Adolescents and Adults

1Department of Exercise and Health Sciences, College of Nursing and Health Sciences, University of Massachusetts, Boston, 100 Morrissey Boulevard, Boston, MA 02125, USA
2Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
3Department of Nutritional Sciences, College of Allied Health, University of Oklahoma, Oklahoma City, OK, USA
4Department of Nursing, College of Nursing and Health Sciences, University of Massachusetts, Boston, MA, USA
5Department of Public Health and Professional Degree Programs, School of Medicine, Tufts University, Boston, MA, USA

Received 23 April 2013; Revised 19 July 2013; Accepted 21 July 2013

Academic Editor: Juan Pablo Rey-López

Copyright © 2013 Sarah M. Camhi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Introduction. The purpose of this study was to examine levels of physical activity (PA) and screen time (ST) in metabolically healthy obese (MHO) and metabolically unhealthy obese (MUO) adolescents and adults. Methods. NHANES data from obese adolescents (12–18 years, BMI z-score ≥ 95th percentile) and adults (19–85 years, BMI ≥ 30 kg/m2) were pooled from 2003–2005 cycles. Metabolic phenotypes were categorized as MHO (0 or 1 cardiometabolic risk factor; triglycerides, HDL-C, blood pressure, or glucose) or MUO (≥2 cardiometabolic risk factors). Logistic regression models estimated associations between phenotype and PA/ST adjusted for age, gender, BMI, race/ethnicity, menopausal status, and NHANES cycle. Results. Among adolescents, PA was not associated with MHO. In contrast, MHO adults 19–44 years were 85% more likely to engage in active transportation and 2.7 times more likely to be involved in light intensity usual daily activity versus sitting. For each minute per day, adults 45–85 years were 36% more likely to have the MHO phenotype with higher levels of moderate PA. ST was not associated with metabolic phenotypes in adolescents or adults. Conclusion. The current study provides evidence that PA, but not ST, differs between MHO and MUO in adults, but not in adolescents. Future studies are needed to confirm results.