I'm so disappointed to hear of your results with OsteoStrong. I have been looking into this and had high hopes for some help. I have severe osteoporosis, have fractured both hips and at least 1 spinal fx, that I know of. Last dexa was -4.8 in spine. I took 1 Prolia shot in April and had massive adverse reaction. I won't take any more meds. Have discovered Dr McCormick on You tube, bought his book, and now looking into his supplements. But the exercise part of this is scary. I walk in a sports pool with resistance weights on most days, but I know it's not enough. In answer to your question, according to the folks at OsteoStrong, you would need to lift 4.2x your body weight to build bone. That sounds pretty impossible to me, but they are trying to sell their program. If anyone else has any feedback on this, it would be greatly appreciated. Best of luck!