If done with and guided by a certified trainer, not by yourself, BioDensity, osteogenic loading, is a safe and has scientifically proven health benefits (by improving muscle strength, balance and bone density). I go to a place called WholeBodySystems in Georgia and it has really helped me in many ways. Absolutely no injuries or pain, and I am monitored by a certified therapist at all times while doing the 4 exercises on the BioDensity unit. Everyone's results will be different of course and nothing is a miracle cure but every little bit counts if done in moderation and correctly. They also provide low intensity PowerPlate vibration sessions which also can help to build bone/muscle and improve balance, again supervised/monitored, which is key. Highly recommend them. I also recommend Margaret Martin's info, posts and videos. She is very knowledgable on osteoporosis. Research is key.