The large, superficial veins on each side of the neck are called

That specific vein which is large and superficial that are located on each side of the neck is called the common carotid artery. In addition, the main function of this type of artery is to let the oxygenated blood flow through our head through the neck. This artery can be easily be felt by placing our fingers on it.

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.