there are alot of posts with different information and we know Prolia is different for every person. I have posted here on the same issue. I have been working out for over 1 1/2 years. At the one year mark, I had my bone density done. It is a -2.5. My workouts have halted the progression of osteoporosis in my spine! No, it will not rebuild bone but no one can tell me how sturdy that rebuilt bone is. Some people have rebound fractures. I will take my chances with exercise, adding vitamin K2, magnesium to my diet.