I agree with yousirname, about Frakes. My buddy pointed out how he's so wooden and stiff and always cocks his head and walks crooked. Now I can't ever see him NOT looking that way.
A back injury will do that.
I have back injury from duty in Iraq that comes and goes from time to time over the last 10 years. I don't walk like that. I do not have a profile and can still run and do PT.
My father broke his back when he fell once. Of course he walked similiar to Riker after the surgery but after recovery and throughout the years unti lhe passed away he walked like a normal person.