My lower back has been steadily getting stiffer and sore-er over the last month. I took about three months off this winter from riding and I didn't allow myself to ease back into riding when I started up again. I saw a doctor today, not because my back pain is debilitating, but because I want to make sure I don't end up with chronic problems down the road. The doctor told me three things, and I bet this will apply to a lot of you who also experience some low back discomfort. 1. My back muscles are super big and stong, my abs are not. I need to do crunches, situps, twists and other ab stuff regularly to keep them up to speed with my back 2. My hamstrings and Glutes (butt muscle) are really really inflexible. They are putting extra strain on my back muscles. I need work on flexibility in those muscles--flexability will put less of a strain on the back. 3. I need to stretch my back out before and after a ride.