Effect of sedentary video game playing on subjective appetite and short-term food intake after a glucose preload in normal weight boys

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Branton, Alyson Deborah
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The rise in childhood obesity has coincided with increased use of screen activities. This relationship is hypothesized to result from decreased recognition of satiety signals because television viewing at mealtime delays satiation and increases food intake (FI) in children. However, it is unknown if other screen activities, such as video game playing (VGP), impact FI similarly or if the type of screen activity is an important predictor of FI. Therefore, this study was conducted to test the hypothesis that VGP for 30 min increases subjective appetite, reduces satiation, and diminishes satiety signals from a glucose preload at a test meal consumed immediately after in 9-14 year old normal weight (NW) boys. The objective of this study was to determine the effect of VGP for 30 min before a mixed meal on subjective appetite, satiation and satiety signals from a glucose preload in NW boys. On four test mornings and in random order, one-week apart, 19 NW (10th-85th BMI percentile) boys (mean ± SEM age: 12.0 ± 0.5 y) received equally sweetened drinks containing Sucralose® or 50 g of glucose in 250 mL of water, with or without subsequent VGP for 30 min, 2 h after a standardized breakfast of milk, cereal and orange juice. FI (mean kcal ± SEM) from an ad libitum pizza meal was measured immediately following VGP. Subjective appetite was measured at baseline (0 min), 15, 30, and post-meal at 60 min, and subjective emotions were measured at 0 and 30 min. FI was suppressed by the glucose preload (759.2 ± 65.8) and VGP (823.5 ± 63.0) compared to the Sucralose control preload (937.7 ± 58.4, (p < 0.0001), and the no VGP control (873.4 ± 60.0, p = 0.05), respectively. Caloric compensation (CC) was not affected by VGP (No VGP: 104% vs. VGP: 75%, p = 0.25). Body composition was positively associated with FI at the test lunch, but not CC. Change from baseline average appetite scores following glucose were significantly lower compared to the control (p = 0.01). Subjective frustration and aggression scores increased after VGP (p < 0.05), but change from baseline subjective emotion scores were not consistently associated with FI. In conclusion, VGP for 30 min before a meal increased satiation through a decrease in energy intake at mealtime, but did not diminish satiety signals from the glucose preload in 9- to 14- year-old NW boys.