Sorry to hear that it didn't work for you. In my case, I had 27 half hour sessions and it left me very weak. After my treatments I immediately started healthy back sessions at the gym which employs a machine that stabilizes your body during back exercise. I go there once every 3 weeks for 15 minutes each time and it strengthened the back muscles. I am 84 years old and there is no limitation to physical activities. I know others who have had the treatments and, most of them, had good results. But, back trouble is nasty and "one size fits all" regarding treatment is not the rule. I hope you find something that gives you relief.