Thanks @Romla and welcome @Teejay I also as a result of chemo and having been on Tamoxifen for 4yrs as I had a recurrence, had bone density issues. My bone density scan post treatment showed Osteoporosis in my neck and lower back. I've been on Vitamin D since January 2016 post treatment and magnesium in water daily. I have Prolia injections 6 monthly to help with this too. They do recommend weight bearing exercises to help build muscle which helps the bones too. I have a scan in 6 months and will know if its improved.
I also use an Exercise Physiologist but it is finishing in 2 weeks, its been amazing and its more the stretching exercises it hasnt been hard and fast at all, Im not capable anymore, but the exercises help alot!
Hugs Melinda xo