What to look for in a prenatal vitamin. Prenatal vitamins are available by both over-the-counter and by prescription. Although formulations can vary from brand to brand, these are the most important vitamins and minerals to look for:
Muscle pairs. Antagonistic pairs of muscles create movement when one (the prime mover) contracts and the other (the antagonist) relaxes. Examples of antagonistic pairs working are: 1  the quadriceps and hamstrings in the leg.2  the biceps and triceps in the arm.uscle pairs. Antagonistic pairs of muscles create movement when one (the prime mover) contracts and the other (the antagonist) relaxes. Examples of antagonistic pairs working are: 1  the quadriceps and hamstrings in the leg.
Your biceps and triceps are examples of agonist and antagonist muscles. An agonist muscle is the primary mover. The primary mover is often responsible for initiating the major movement by a muscle shortening contraction. The antagonist muscle is a secondary mover.aily Movement. Muscles close in proximity, such as the biceps and triceps, often work in groups to create functional movement. Functional movement is motion that contributes to your ability to complete the tasks and activities that form your daily life.