Hello, At 63, I suffered 3 spinal compression fractures. I was a competitive distance runner too who had amenorrhea until I suffered a stress fracture at the neck of the femur ( overuse). As it healed, my periods returned. I slowly returned to distance running, but the lack of adequate nutrition for the intense training probably started my bone loss. I reluctantly began Evenity, followed by Reclast. My spinal T-scores went from -3.7 to -2.9 on Evenity. My femur necks showed little change on the medication. The right was -2.6 (slightly improved to -2.5) and the left ( the previous stress fracture, was -1.8 (slightly improved to -1.6). I had very few issues with either medication. The next bone scan will be in about 2 years. Currently, I still work out, lift light weights, walk, and bike….but I don’t lift the little grandchildren. I don’t know what the future holds in terms of other medications after Reclast, but I guess I’ll have to prepare to cross that bridge ‘before’ I come to it.