Which is a recommended feature of a good exercise shoe? a.) a sole that is exactly the same height at the heel and the toe b.) a cushioned heel cup to protect the heel from impact c.) a firm, molded inside to stabilize the foot d.) a sole at least at wide as the upper part of the shoe

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.