title: Effect of exercise and protein intake on energy expenditure in adolescents.
abstract: In order to evaluate the influence of physical exercise and protein intake on Resting Metabolic Rate (RMR) and Postprandial Energy Expenditure (PEE), 16 healthy, normal-weight, 15 year-old, adolescent males at the same stage of pubertal development were studied. They were assigned to two dietary groups receiving the same energy intake (1.3 x by measured RMR) and different proportions of macronutrients (13% protein, 39% fat, 48% CHO in Group A; 30% protein, 32% fat, 38% CHO in Group B). An increase in postprandial energy expenditure, relative to basal, was observed in all individuals. The postprandial energy expenditure was higher in group B than in group A. Postprandial Post-exercise Thermogenesis (expressed as Kcal/3 h) was significantly higher in group B than group A (p < 0.05). Although the RMR on the test day was not different between the groups, the RMR on day 2 was significantly higher than on day 1 in group B (p < 0.01). In group B, the post-exercise RQ was significantly lower than the preexercise RQ (p < 0.01). It is concluded that in normal-weight-adolescents, a hyperproteic diet followed by moderately-intensive exercise induces increases in EE and decreases in RQ in the postprandial post-exercise period and is accompanied by increase in the RMR the following day.
authors.affiliation: Unitat de Recerca en Nutrició i Creixement Humà, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Barenys
authors.forename: M A
authors.initials: MA
authors.lastname: Recasens
authors.forename: C
authors.initials: C
authors.lastname: Martí-Henneberg
authors.forename: J
authors.initials: J
authors.lastname: Salas-Salvadó
mesh_terms: D000293:Adolescent; D000886:Anthropometry; D001481:Basal Metabolism / Q000187:drug effects; D002151:Calorimetry; D004044:Dietary Proteins / Q000008:administration & dosage / Q000494:pharmacology*; D004435:Eating; D002149:Energy Intake; D004734:Energy Metabolism / Q000187:drug effects; D005080:Exercise Test; D006801:Humans; D008297:Male; D005082:Physical Exertion / Q000502:physiology*; D012016:Reference Values; D013997:Time Factors
chemical_list: D004044:Dietary Proteins