Hi @callalloo I studied the Whole Body Vibration Machines on Amazon and bought the Eilison Bolt. It is 11 lbs., a light weight that I can move fairly easily, has a five year warranty and three programs for building bone density (they claim). (With osteoporosis, the directive is don't lift more than 20 lbs.) The Bolt also works on carpet with a yoga mat placed underneath it. I've been doing two 15 minute bone density programs twice a day since August. So far, it's firmed my muscles. I won't be eligible for another Dexa scan for a year, and most studies of whole body vibration machines put participants with low bone density on them for two 15 minute sessions five times a week for a year, so if it does work, it will take time. After I gave up my weighted vest, I made a weighted belt with two one pound ankle weights and one 2.5, but my rheumatologist said that could cause spinal fractures so I gave up pursuing anything along those lines.