To those buying vibration platforms -BEWARE- your bones respond and are safe at only a certain level of intensity , amplitude, etc. The input needs to be very light, hence -LIV -low intensity vibration!!!! You need to do some research as many platforms on the market are UNSAFE!
The Marodyne is safe , but expensive~$ 3000. I think there is one more that is safe, but I’m at camp and don’t recall. Goggle Marodyne LIV platform , or Clint Rubin related to
The LIV- he developed that platform. Stay Safe while trying to improve your bone quality rather than having a potential set back. The Marodyne has most affect on the quality of bones in the spine/lumber area as those are more trabecular (“soft” for lack of a better term ) in nature than hard, cortical bone. Like the bones in your hips, forearms, etc. The femoral neck hip is also somewhat trabecular in nature.
Good luck !!!

Morning ginginrummy~
Thank you for your interest in the Nasa studies re: bone density. I would google that very issue..."Nasa bone density studies"...there are many different studies going on. Being in anti-gravity exposure for even a limited time does cause bone and muscle degrading..so Nasa has sought out ways of re-establishing healthy bone strength and muscles with various remedies. Margaret Martin has many videos on ways of dealing with osteoporosis that are ameloritory and not destructive. She also is now selling her own type of a vibration plate. I believe that the hz limit for rebuilding bone is around 40....a lot of the machines out there vibrate at a much higher hz that could prove to be unhealthy to use..at they could cause further damage to already compromised bones. I'm finding that most of the comments people write about also have many other problems going on..so it's never a 'one side fits 'all' remedy.
I'm coming up to being 79 and while I was quite an athlete in my youth and mid life..at this stage..I'm not willing to cause further harm to my bones with any extreme measures. ...I gave away my tennis rackets as well as my pickleball gear. I don't need another fall! It takes time and energy to turn around the numbers most of us face with the osteo diagnosis and numbers. I have not had another DEXA for a couple of years now and maybe will not do another..as I'm really doing all I can at this point without taking medications for osteo. I fear the contraindications and at my age and feeling as well as I do with 3 compression fx's and a bulging disc..also bone on bone knees...I choose quality of everyday life and not expecting miracles. I do do a lot of natural supplements..collagen, Bone-up, glucosamine sulfate, turmeric extracts, stonthiem, to name a few....I also walk briskly with walking poles, over a mile, to take some weight off of my knees..walking into pain is not helpful for anyone. I would strongly suggest to all to NOT go to OsteoStrong or any place that calls for extreme measures as bones that are already compromised do not need to have that kind of stress placed upon them. I feel that I caused 2 of my compression frx's when I did go for one treatment and was told that I needed to 'press" 4x's my body weight...which came to over 575lbs of pressure. I felt the immediate pain in my thoracic region and sure enough, I did have 2 additional frx's. The one that I did know about was caused by a mis-marked step which caused me to trip, I caught myself on a small fence and slammed my mid back into that instead of doing a faceplant. I didn't have x rays then..but later found out that I did indeed have a compression frx of my T-8...then after the Osteostrong treatment, I had 2 additional frx's of T-9 and T-10 . The amount of weight 'they' asked me to maintain..even for the few seconds..coupled with the high hz of their vibration plate, I feel caused further harm. So beware of what you do! I would strongly advise doing strength exercises, walking...staying active...eat a healthy diet..have a positive outlook..as many of us can get down on ourselves with the amount of different things going on as we age to bring us down and cause depression. I'm still 5'4"..and weigh 125lb. so that being...I can't assume to now do extreme things to remedy my bones..other than being smart about it and staying active and grateful for the otherwise good health I do have. I do have a vibration plate that I stand on that has the lowest hz..being at 40hz. I also use my far-infrared belt when I do get mid back pain as well as a heat wrap...that feels really good and does take away the pain when I do get it. I don't lift more than 9lbs any longer..(the weight of a gallon bottle of water) when I can avoid it. I wear a back brace when I vacuum or do anything that is out of my normal living. I wish you well on your journey as well. I try and stay in the 'now' and not worry about tomorrow...just getting through each day with gratitude and trying my best to be kind and helpful to others. Be kind to yourself first! Hope this helps you.