I got back to riding today after taking a few days off to recover from The Cheaha Challenge. I rode 20+ miles without any back pain. It seems I only get the back pain when I ride fast and really push it. I guess I need to see if I can figure out how to stop that from happening. I see that the preliminary results from The Cheaha Challenge have been posted on their website. I do have some questions about them, but they are preliminary. I'll hold off on comments until they can sort out the final results. It was a fun ride.