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To examine whether video game playing contributes to obesity by increasing caloric intake, investigators conducted an experimental study under laboratory conditions in 22 healthy, normal-weight male adolescents (age range, 15–19 years) in Denmark, with each subject serving as his own control.
Investigators served participants a breakfast that provided 25% of their estimated daily energy requirement and then randomized them to either rest in a chair or play a soccer video game for 1 hour. Participants were served a pasta lunch and asked to eat until satiated. Blood specimens for serum glucose, insulin, cortisol, and ghrelin were obtained every 10 minutes, and indirect calorimetry was used to estimate caloric expenditure. Participants complete…