Yeah, you hike and backpack too, as do I, and that should help. We both ski, also. Maybe I'll do more running when I heal.
Do you have a family history of osteoporosis? I'm sure there's a genetic component to susceptibility. I've heard the same many times about road cycling being terrible for bone density, interestingly MTB isn't nearly so harmful because of all the impact. But it's rare for me to MTB, I have to travel to the eastern slope and rent one.
I wish I could take a longer course of pred!