Sell, Instruct, Train. In that order.
In this role, your sales muscle is the one you need to train most frequently when you start out at the bottom rung of the ladder. It's kind of a given that you must be good at the other stuff (training clients, delivering group fitness classes, building rapport with members etc). Also, the role might be part time, but you are expected to be flexible - more... with that. Meaning, your business building is sort of on your own time, which means anybody with a full time job will need to think twice before dabbling with this "part time and a half" endeavour. But, the satisfaction of teaching movements and ex ... - less