Jerry's goal is to increase his arm strength look at these entries in his workout log and determine which principles of training is he most likely focusing on in order to reach that goal

Jerry's goal is to increase his arm strength look at these entries in his workout log and determine which principles of training is he most likely focusing on in order to reach that goal.
Jerry is focusing on doing reps to improve his arm strength.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Is this used on a test? ?