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Get on all fours with your hands underneath your shoulders and your knees underneath your hips. Extend your right leg so it’s straight, then lift it to hip height. Lower it across and behind your left leg, then raise it back to hip height. Touch down in the center position, raise it to hip height, then open it to the right side and touch the floor. Raise it back to hip height and touch down in the center to complete one rep. Do all reps on one side, then switch.