BACK PAIN

I have been suffering back pain for more than 10 years. 3 years before I fell down from 2 metre height that made a compression fracture in the middle of my back bone and had to rest for 45 days. Now it is almost OK but my left leg feeling stiffness and sometime tingling. I am regulary walking for about 20 to 30 minutes and exercise for 5 to 10 minutes lying face down with legs lifting alternately. While lifting the left i feel more pain and difficulty than the right one. I had an MRI scan which says the condition is not severe. Please advise