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Lean and Obese post pubertal adolescents perform an aerobic exercise program 30 minx4/week at a heart rate corresponding to at least 70% of that obtained at VO2 peak. The exercise program is preceded and followed by a 7 d diet delivered by the metabolic research kitchen (identical on both study occasions); metabolic studies (identical on both study occasions) including 24h calorimetry, measurements of glucose and lipid metabolism and insulin sensitivity and secretion using compounds labelled with stable i.e. non radioactive isotopes and gas chromatography-mass spectrometry.Fat mass and lean body mass are measured by DXA and visceral/subcutaneous, hepatic and intramyocellular fat by MRI/MRS. Since we want to specifically determine the effects of exercise, there is no intent of weight loss. The subjects are weighed twice a week to assure weight stability.
Observational Model: Cohort, Time Perspective: Prospective
Baylor College of Medicine
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Published on BioPortfolio: 2014-07-23T21:12:24-0400
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The exercise capacity of an individual as measured by endurance (maximal exercise duration and/or maximal attained work load) during an EXERCISE TEST.
Controlled physical activity, more strenuous than at rest, which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used. The intensity of exercise is often graded, using criteria such as rate of work done, oxygen consumption, and heart rate.
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