age. >> i remember when i was young i would like to go on the balance beams. >> i remember jumping on the trampolines. >> doctors like dennis cardone worry about pushing kids into specialized sports too soon. >> we are seeing injuries in younger children we had never seen before. we're seeing overuse injuries which were exclusive to adults and now we see them in 7 it, 8-year-olds. the government now classifies more than 10% of preschool age children as obese. >> swing forward. attaboy. then on the blue. right back. >> everyone agrees kids need to be more active. it's the how that's the question. there's organic play and then there's specialized sports. where do you cross the line? >> unstructured activity is -- has probably will lead to less of these overuse type injuries that we see. it's not until you introduce a parent or a coach into the activity that it leads to these overuse type injuries. >> it's one thing to encourage babies to stretch and roll, say psychologists like wendy walsh, but toddler sports training is extreme parenting she says,