Movement: Grasping a fixed object in front of you for support, straighten and swing one leg across your body in both directions. Keep the leg straight and make sure range of motion comes from the hips and not from flexing and extending the lower back. Only extend your range of motion as far as you can while generating the motion in the hips.
Repetitions: Perform all prescribed reps on one side, then on the other. This counts as one set.
Instructions and effects for the Side Leg Swings exercise 
Movement in Sagittal Plane