Originally Posted by
B. Carfree
I've never had a bone density scan, but about a decade ago when I had a soccer mishap that required that my leg be screwed back together, the team orthopedists for the Sacrament Kings were running up and down the halls with my X-Rays showing off the densest shin bones they had ever seen.
Maybe all that excess bone is affecting my climbing speed.

Which is comparatively unusual for the distances you ride because conventional wisdom says that cycling is not a good physical activity to maintain bone strength and to reduce the incidence of osteoporosis because it doesn't involve impact loading.
From my understanding, weights are not a significant prevention for osteoporosis, rather it is the need for impact on the skeletal structure, as in when walking, and particularly when running.