From Latin flexion, flexion is the action and effect of bending the body or any of its limbs. It is a movement of approximation between parts of the body through the action of the muscles. Muscle flexion makes it possible to bring the forearm closer to the arm, for example. The opposite movement to flexion is extension. In this case, a gap occurs between the bones or parts of the body.
Another example of flexion occurs when we bend over and touch our toes. Since we bend the body in order to touch our feet.
