Hi @callalloo, I think it was @bunky44 posted the comments about the fractures. I hope she's okay. I saw an earlier posting that mentioned Margaret Martin has exercises for those with fractures.
I was using the Eilison Bolt twice a day, for about ten months, two fifteen minute "bone building" programs and they were intense! I'm fortunate nothing happened. The paper I had read about Whole Body Vibration Therapy bone building didn't mention any adverse effects for the test subjects, and I assume they were using the high vibration machines, but there was no discussion of G (gravatational force), just Hz, acceleration, and amplitude of motion.

I thought I had done my due diligence, but apparently not, and Margaret Martin's article is fairly recent.

I'm glad you are enjoying Dr. Fishman's yoga. I was doing the Algaecal versions for a while, and worked my way through the three versions. They're agonizingly slow. but useful for getting the proper form. Lately, I've been enjoying the fast pace of Dr. Fishman's video.

Take care.