When I think of Dr Kenny and those that need him, I think of two categories:
First, those that are stiff and hurt today, they may be Older, take a moment before they take a step after standing up. They need an adjustment today to feel better and be active this week. This is a Home Run.
Second, a younger man who is athletic and active in his sport. He is sore, or upset that he will be sidelined for the next game or two. He is looking for the edge that will get him back into the rythem he was used to. Perhaps he is recovering from an injury and does not want it to be Career Ending. He needs Dr Kenny longterm, it is a Grand Slam.