Instead of giving speed to your kids while their brains are still growing, maybe force them to ride their bikes to school instead? Although you can be arrested now for the latter and not the former, I guess...

Also, a psychiatrist once told me that although he would love to "prescribe" exercise to his patients, especially the teenagers, the truth is that people struggling with mental health issues find it even harder than perfectly healthy people to exercise regularly.

you mean like our parents used to say:  "GO THE FUCK OUTSIDE"

Yes. Although just politely saying "go outside" also works.

go figure. using our meat machines helps ADHD and Depression. 

If only the body and brain came with a user manual. Or source code. 

The more I read, the more I believe that keeping the body in motion helps the brain. Even walking. 

http://pandawhale.com/post/51579/can-lifting-weights-improve-your-memory