SWIMMING. I am now going 3 x week. On anastrozole, but EVERY OTHER DAY. I found the following Medical Library site. So far, they believe swimming helps osteopenia and osteoporosis in that swimming strengthens the muscles around the bones. The cushioning helps stop fractures. No published clinical trials yet, but all the facts show evidence of positive reaction to swimming.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7245678/#:~:text=Swimming%20may%20increase%20bone%20density,in%20the%20pathogenesis%20of%20osteoporosis.
I'm afraid of osteoporosis since I am already verging into osteopenia territory. I am 78 years old and 219 lbs. Down from 251 a year ago. Intermittent fasting. Yep, it works. Sara