Side bending is Leaning forward slightly to keep from "hunching" your back and shoulders. Keep your hips, shoulders, and ears in a straight up-and-down line. Raise your right arm overhead and bend your upper body to the left in a reaching motion. Keep your upper body facing straight ahead—don't twist it to the side as you bend. Cervical rotation is moving head left or right. The cervical spine rotation device movement mobilizes the cervical spine in transversal plane activating the rotating muscles of the head.