Sneakers41 - I have to agree. I have used muscle rub for my lower back pain and it works great. I also like the suggestion of working out in a pool. When I developed a running injury, I worked out in a pool.
I swam and took water aerobics classes because I had to exercise but I also needed to allow my legs to recover. The nice thing about exercising in the water is that the water protects you from injury and provides a great level of resistance. I also think that it is refreshing.