I can not emphasize enough the importance of strength training if you are experiencing chronic low back pain. Most people with low back pain shy away from strength training or the gym because they feel it will hurt them more. This is one of the biggest myths out there in the fitness industry in my opinion. One thing people do not realize is strength training is a broad term and there are so many different types of strength training that can help when it comes to back pain. With this said, performing the correct exercises and being taught proper technique is crucial.
Over the last 10 years I have worked with a lot of people with chronic low back pain and everyone of them has very little pain now after being consistent with a strength program. Strength training is not a quick fix to low back pain you have to work hard and stay consistent with your program, but it will pay off.