As fatigue sets in, it can be difficult to maintain proper form; however, it is important to be in control of your body’s movement with each exercise to avoid unnecessary strains or injury as well as to gain the full benefits of a given exercise. As an example, consider the movements of a complete push-up: it is important to maintain a tight core, neutral neck position and to control the motion of lowering your body to the floor (or ball/bench), as opposed to letting gravity do its work.