Hi @edelweiss,
I stated using the Eilison Bolt in August. I ordered it from Amazon because it could be used on carpet, weighed only 12 pounds and came with a five year warranty. It has three bone building programs, which are 15 minutes in duration. I do two a day, most of the time, spaced at least two hours apart. I won't be getting another Dexa scan for a year. I decided to buy this based on an article I read"Whole-body vibration exercise in postmenopausal osteoporosis" . Here is a link:
https://pubmed.ncbi.nlm.nih.gov/26327887/
Here is a more detailed discussion I just found that was published in November 2021 that warns about dangers of using high intensity vibration, especially with fragile bones:
https://melioguide.com/osteoporosis-exercise-equipment/whole-body-vibration-therapy/
When I purchased the BOLT, I contacted Eilision and asked questions regarding the vibration frequencies and speeds of the BOLT that were the ones cited in the study and they couldn't provide me with the data.
I am going to read the Melioguide paper thoroughly. I suspect the Bolt is a high vibration vs. low vibration machine. If I find some worthwhile information, I will post it so now I urge caution.
There is a safe Yoga program that helps build bone density, Dr. Loren Fishman's "12 Poses vs Osteoporosis" which you can google. I started doing this yoga program everyday a couple of months ago.
Thank you for asking this question. It caused me to do more research on this subject!