Hi experts!

I am doing a very simple body weight/small weight/exercise band routine a couple of times a week but it leaves me with back pain after each session.

I pull my back out fairly frequently, but this is not the same. It's all-over pain that is dull and annoying. I realize that this probably has to do with weak stomach muscles and I've been trying to work more on that, but even stomach exercises hurt.

I'm wondering if anyone can recommend some exercises I can focus on to strengthen my back so I can continue on to my fitness goals.