@md79 I would say be very careful. In order for participants to be in the lift more study, you had to be fracture free and only have osteopena. I had previously fractured my feet and wrist. I have severe osteoporosis and wanted to try and build bone lifting weights. 3 or 4 months in I had a stress fracture in my ankle. My doctor said you should not lift heavy with severe osteoporosis as it actually increases your risk for stress fractures. I'm currently taking Tymlos and hrt and doing light weights. Hopefully I will get good gains and then lift heavy in the future.