The straight position of an arm or leg

The movement of a horse's leg forward due to the use of extensor tendons.

movement that pulls apart both ends of any part

The movement by which both ends of any part are pulled apart (e.g. elbow extension—the arm is completely straight).

A movement whereby the body parts are brought into a straight position.

Body part (i.e. hand, neck, trunk, etc.) going from a bent to a straight position, as in leg extension.

Dorsal exercises or trunk movements performed in the sagittal plane around a transverse axis.