Chronic aerobic exercise leads to an increase in the enzymes that make dopamine, so exercise is not just a body issue. It's a brain trainer. This is again caused by problems with the attention network and the dopamine system. Tell us what that is about. The book has received a lot of media attention because it challenges previous diagnostic notions.
Environmental traumas can definitely produce a syndrome very similar to attention deficit disorder.
Thus it can be confused or misdiagnosed.