T Tim O New member Jul 14, 2009 #1 I do thriathlons, and I find that when I ride my bike for at least 20 plus miles, my lower back starts to stiffen and hurt...why, and how can I stop this?
I do thriathlons, and I find that when I ride my bike for at least 20 plus miles, my lower back starts to stiffen and hurt...why, and how can I stop this?
