Stand and touch wall or stationary object for balance. Grasp top ankle or forefoot behind. Pull ankle or forefoot to rear end.
Straighten hip by moving knee backward. Hold stretch. Repeat with opposite side.
Alternatively, hip may be initially extended, then ankle can be slowly pulled towards rear end. With either technique, do not allow knee to flare outward to side. If low back is sensitive to hyperextension, hip should be postured in more neutral position than demonstrated. If knee is not completely flexed, Iliopsoas may be stretched; Quadriceps will not be stretched significantly. See Standing Tibialis Anterior Stretch for similar exercise which can be combined with this stretch and performed simultaneously. If range of motion prohibits grasping of ankle or foot try Standing Quadriceps Stretch with towel.