I have been interested in the use of air vests and the lack of air vest research for years. I have participated in discussions about them on this forum, also for years.
I too have medical education (not engineering or physics) and after the extensive discussions we have had on this forum with many well educated members I tend to come to the same conclusions about air vests as do the majority, including Rayers
.I would discourage you from putting an air vest on a 90 year old but if you are determined to do so then you will.
No proper studies have been done about their use in equestrian activity and all “evidence” of their effectiveness is anecdotal.
I don’t know you and I didn’t look at your screen name before responding to your post so don’t worry that your name is important to me or that I “have a crush” on you. It is the subject matter that is important, it’s certainly not about you.
Please do link to the air vest study. Especially the one studying the effects of an air vest on a 90 year old rider that has fallen from a horse (or failing that, any scientific based study at all).