Update. I met the patient last week again. She was almost, but not quite pain free. On a VAS pain scale she had 1, whereas she had 7-8 at our first meeting. I did try the supine extensions and varities of that one earlier on but she just got more radiating pain to her leg... tried a prone version as well with gradual movement from her shifted position to the midline. Anyway... she said she mostly did the exercises she started doing on her own to begin with, such as supine "leg-twists" for some lumbar mobility.. some stationary biking apparently felt good also. Maybe she would have spontaneously improved even without exercises.