It must be a really bad case of AT, because I'm currently battling this from all my running, but it doesn't even bother me on a bike. I've started doing a lot of sprinting runs and that really does add much stress to the body.

BTW, how old are you? I'm 52 and I've had to deal a lot with injuries over the years and I've found that weightlifting, followed by plyometric exercises are indispensable in maintaining a healthy musculoskeletal system. Unfortunately I mistakenly thought for a long time that since I hike and bike a lot that I didn't need to do lower-body exercises. Absolutely Wrong!!