So the question is, to qualify to be a coach, trainer or instructor within sports should this person also be able to correctly visibly show whatever they want the person/persons to do? or is it sufficient that the person understands the fundamentals? This is a tricky one and I expect a wide range of answers, so what do you think? What do you think qualifies a person to be a coach, trainer instructor? I know that within some sports such as martial arts/budo the person instructing is normally a sensei with all the experience so lets leave those out.