Just thought I'd share this link (it's a short article):
www.theatlantic.com/health/archive/2014/09/exercise-seems-to-be-beneficial-to-children/380844/
My own dc are NT, and I think they would benefit from more "free play" outside at school. I Suppose they have peers that would benefit even more. I wish the school leadership team would get rid of some of the interminable assemblies and let the kids run around more.