A generation of sedentary lives

This is alarming.
At the risk of bugging you with the old refrain "When I was a kid. ..." I will tell you what recreation was like when I was a kid: In the summers, my mother basically told me and my brother to get lost--go play outside. Fortunately we had lots of neighborhood friends to pal around with. I mostly remember making forts in the woods, climbing trees and going to the park to float homemade boats down a creek. If it rained, we made forts out of bunk beds.
Obesity is slowly but surely becoming a national epidemic. Thoughts? Suggestions for improvement?