Agonist Muscle

The agonist muscle is the main muscle that creates movement at a joint.

The agonist muscle is also called the “primary mover.” During tummy time, a baby pushes up from the floor with their arms and extends their elbows. In this case the, elbow extenders or triceps brachii are the agonists!

A baby pushes up on straight arms in tummy time. A label for the agonist muscle points to the back of the upper arm.

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