Learn how and why you must know how to do an evaluation on each and every student as you will not treat this like an aerobic class. You will learn how and why to do a postrual evaluation as to know which exercises to advoid. Learn the anatomy of each exercise and why. You will leave being a real trainer no a parrot or a perfomer but one who will know how to think critically as you are dealing with bodies and being paid for it. Therfore it is crucial that you ultimately know the purpose of an exercise