I've been meaning to post about this story on the preteen exercise slide from the Minneapolis Star-Tribune.

Some interesting research is finding that kids tend to be active for about three hours a day up to the age of 9. But by the time they're 15, the active time has gone down to less than an hour a day, and to just about 35 minutes on the weekends.

These seem to be telling numbers as we face the continuing child obesity crisis, which affects nearly a third of U.S. kids, according to the story.

I'm wondering what we can do about it. Schools have been squeezing out recreation time, especially for older kids, to make room for academics. After school, if your child doesn't make a sports team, it may be tough to draw him into activities when he'd rather be texting, text-messaging, or playing video games.

What are you doing to keep your kids active?

(Associated Press photo of young gymnasts in Beijing by Greg Baker)