Teenagers are sluggish!
A study in the July 16 online edition of the Journal of the American Medical Association examined the physical activity of children and youth between the ages of 9 and 15 over a 6 year period. They found that 90% of 9 year-olds get a couple of hours of vigorous exercise every day... but less than 3% of 15 year-olds engage in that much activity. On average, 15 year-olds did 49 minutes on weekdays and 35 minutes on the weekends, and boys were more active than girls. You can read more here.
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