I've been having a lower back pain for the last 9-10 months. When I bend my body in a forward position, I feel pain. When I run or play for a long time , I feel fatigue in the back area and pain is there. I consulted a doctor 6 months ago. He told me I had muscle stiffness and so did my physiotherapist. I did back stretching & strengthening exercises for some days but the pain is still there the same more or less sometimes . Whenever I stand after sitting for a long time , I feel jerks in back