redletterdave writes "Researchers from Baylor College of Medicine in Houston, Texas, designed every kid's dream study: they passed out Wii consoles to 78 kids who didn't already have one, and gave half the kids their choice of active game — such as Wii Sports or Dance Dance Revolution-Hottest Party 3 — and the other half their choice of inactive game, such as Disney Sing-It Pop Hits or Super Mario Galaxy. The research team tracked the youngsters for 13 weeks, testing their physical activity levels with a motion-measuring accelerometer. Participants wore the devices on a belt during four different week-long periods throughout the study, which allowed the research team to determine when they were sedentary or lightly exercising and when they were engaged in moderate-to-vigorous exercise. Accelerometer logs showed that throughout the study period, kids with the active games didn't get any more exercise than those given inactive video games. There was also no difference in minutes spent doing light physical activity or being sedentary during any week the researchers monitored."
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