Want to give your child a head start on lifelong fitness? Consider children's sports and other kid-friendly physical activities. With your encouragement and support, chances are a few sports will spark your child's interest.
The lower-body muscles are primarily targeted on elliptical trainer, including the: 1  Buttocks (gluteus maximus) For greater the butt-firming effect, increase the incline. 2  Front of thighs (quadriceps) The elliptical trainer really works the quadriceps. 3  However, thankfully it isnât as noticeable as on the stationary bike.
Synergist and Eccentric Defined. In order for movement to occur, muscles must contract. According to Andrew Biel's Trail Guide to the Body, a muscle that leads an action as a primary mover is called an agonist. A muscle that supports the agonist is called a synergist.Muscles that work together in achieving the entire movement are called synergists. Concentric movement is when a muscle is contracting and shortening at the same time.ynergist Muscles. As you lower yourself into the eccentric phase of the squat, all four of your quadriceps are elongated. The four quads are the vastus lateralis, vastus intermedius, vastus medialis and rectus femoris.