The main point I am wanting you to see in this Crenshaw interview is not so much of the dog just running that tread mill. But how it was being encourage to work. At it's own pace till the dog gets stronger as it goes. A little more each day.

Note how calm Crenshaw is and gets in no hurry. Everything is well thought out and on a well planned schedule. A dog can sense these things from it's trainer. Like James says to that fellow just good exercise and good feed. You want your dog feeling like brother Si of Duck Dynasty. Happy, Happy, Happy. LOL