Most Teens Don’t Get Enough Exercise

By age 15, fewer than one-third of U.S. teens get the exercise they need, a study has found. U.S. officials say kids should spend at least an hour a day in moderate to vigorous exercise. The study showed a sharp dropoff as kids got older. At age 9, about 9 out of 10 were active at least 2 hours a day. At age 12, the average was about an hour a day. Girls at all ages were less active than boys. The study tracked about 1,000 children from 2000 to 2006. They wore a gadget that recorded their activity. The Associated Press wrote about the study July 16. It appeared in the Journal of the American Medical Association.