Mobility work on your feet can improve position while running which may in turn increase the pace you are able to maintain when jogging or running. Many factors can impact running pace.
Yes, runners can benefit from quad smashing and addressing other muscles groups utilized when running. Quads, hamstrings, calves, back, upper body all impact a person’s ability to move, breathe, and perform.
Taking care of your body is a key aspect of performance levels.