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www.wisegeek.com/what-are-the-differences-between-antagonist-and-agonist...

Antagonist and agonist muscles work in pairs to accomplish a full range of movements and actions. Muscles, however, are not specifically antagonist or agonist. Depending on the movement required, a muscle can be an agonist in one motion and an antagonist during another action.

en.wikipedia.org/wiki/Anatomical_terms_of_muscle

Antagonist and agonist muscles often occur in pairs, called antagonistic pairs.As one muscle contracts, the other relaxes. An example of an antagonistic pair is the biceps and triceps; to contract, the triceps relaxes while the biceps contracts to lift the arm."Reverse motions" need antagonistic pairs located in opposite sides of a joint or bone, including abductor-adductor pairs and fle...

www.reference.com/science/example-agonist-muscle-d200298de93c774a

What Is an Example of an Agonist Muscle? During arm extension, when the arm is being straightened, the triceps muscle is considered the agonist muscle. The agonist muscle is also sometimes called the prime mover, and is the muscle that generates the primary movement by contracting.

study.com/academy/lesson/antagonist-muscle-definition-examples.html

Another leg example of an antagonist muscle and its paired agonist is in the upper leg. The muscles at the front of our upper legs are called the quadriceps muscles, and they act as an antagonist ...

www.ptdirect.com/.../skeletal-muscle-roles-and-contraction-types

2. Antagonist: The antagonist in a movement refers to the muscles that oppose the agonist. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. While the agonist contracts causing the movement to occur, the antagonist typically relaxes so as not to impede the agonist, as seen in the image above.

medical-dictionary.thefreedictionary.com/Agonist/Antagonist+Muscle+Pair

Agonist/Antagonist Muscle Pair A dyad of muscles that essentially counteract each other’s activity about a joint. Examples • Pectorals/latissimus dorsi—pecs and lats • Anterior deltoids/posterior deltoids—front and back shoulder • Trapezius/deltoids—traps and delts • Abdominals/spinal erectors—abs and lower back

www.quora.com/What-are-some-examples-of-agonist-and-antagonist-muscles

Here is what agonist/antagonist muscle groups are and how they help build muscle faster than traditional workouts. All this really means is opposing muscle groups: Chest/Back Bicep/Tricep Quads/Hams There are programs that are designed around anta...

www.verywellfit.com/antagonist-definition-1230986

Most of the muscles in the torso, arms and legs are arranged in opposing pairs. That means, when one muscle is contracting, like say the biceps muscle, that muscle is the agonist muscle during an exercise. The antagonist muscle is the opposite muscle which, in this case, would be the triceps.

study.com/academy/lesson/agonist-muscle-definition-example.html

The antagonist muscle group opposes the agonist. The antagonist muscle relaxes so that the prime mover can contract and rotate the bone at its joint. Let's go over that again: Agonist muscles contract

www.aworkouts.com/skeletal-muscles-and-antagonistic-pairs

During ballistic motions such as-throwing, the antagonist muscles act to ‘brake’ the agonist muscle throughout the contraction, particularly at the end of the motion. In the example of throwing, the chest and front of the shoulder contract to pull the arm forward, while the muscles in the back and rear of the shoulder also contract and ...