i think most good rehab centers, although recommending exercise, do not allow vigorous exercise as it just replaces one addiction with another.One could certainly argue that it is ultimately a better addiction….but still a addiction(i'm sure it's a little more complex then that)
Looking back at my life and even today. If it wasn't and isn't for my endurance sport activities I'd definitely have gotten into the drugs and alcohol. Which knowing my ADD or Mild Autism or whatever they call it now makes one susceptible.
On a side note, how many know that Ray of Ray's MTB park is a former addict??
But the reality is, that when dealing with stuff like this meetings and such can help. But if one is wanting to change they have to figure out a path that works for them that allows them.