Chemo and osteoporosis

If anyone told me chemo causes osteoporosis, I Know I would have remembered. I just found out yesterday. I'm waiting to hear if my oncologist thinks there's anything I can do to reverse it, or at least stop it, or even slow it down. But if I knew last year what I just learned, I would have waited to have my knee replaced. Aging was already nudging me toward arthritis, but chemo put it into overdrive. Joints I didn't even know I had before chemo, and the knew knee hurts enough to require pain meds The first thing I thought was that while I'm climbing around the hill behind my house to clear brush, I could break something and wind up yelling "Help, I've fallen and I can't get up!..." I plan to ask my doctor lots of questions, but if any of you have thought this through, please let me know what you've done to maximize flexibility and minimize pain. Or if anyone is having success treating chemo-originating osteoporosis - if you know about something out there that strengthens bones - please let me know.