I would like to see a chart that shows "physical activity vs mental illness". Physical exercising is known to be one of the most effective methods to prevent an

I would like to see a chart that shows "physical activity vs mental illness". Physical exercising is known to be one of the most effective methods to prevent and cure mental illnesses and especially kids' activity levels have plummeted in the past one or two decades. I think this might easily be the whole story and no other intervention is needed than to get the kids to play outside and do sports again.