for three months I have been suffering from a very stiff lower back and difficulty walking, I hurt my lower back doing forward streching and pull ups and dips, and I kept excercixing with the injury, now is agravated and I have difficulty walking it seems I hurt my lumbar muscles, I went to see a sport dontor said I have lumbagia withe overworked lumbar muscles, but I still have a very stiff lower back and difficulty waliking, what is your advise. stop exercising completly