This post was inspired by the thread on corsets, after several people said that wearing one helped their bad back problems.
I've suffered from back pain, sometimes disabling, my entire adult life (I'm now 66). A lot of it is cramped muscles, but I also get 'pops' and my back 'going out,' both of which are caused by what the doctor told me is mild arthritis in my back. The arthritis may be mild, but the pain sure as heck isn't. A few months ago, mostly out of desperation, I started on the carnivore diet. I've been on it off and on ever since. What I've noticed is that when I'm sticking to it, I do not get the back popping and going out kinds of pain, and the muscle cramping pain is reduced. When I go off of it, the popping and going out immediately returns. That's a rather strong inducement to staying ON the carnivore diet, LOL! It makes sense, because arthritis is caused by inflammation, and an all-meat (plus eggs) diet is the least inflammatory diet out there. That is, in fact, the reason I decided to try it in the first place. I was having so much muscle pain that I could hardly function -- and being non-functioning, when I have a handicapped daughter to care for in the house and chickens, goats, dogs and a cat outside, is simply not an option. I was dubious about just eating meat, but within a couple of days, the muscle pain was down to where I could live with it. And it wasn't long before I noticed that my back was hurting a lot less, too.
So, by all means wear a corset rather than a bra! But if you are having a lot of back pain, please consider changing your diet, too. I'm finding that I do pretty well on mostly meat with some non-starchy vegetables, so I don't necessarily have to be totally carnivore. Dairy is a problem (and here I am, with dairy goats and raising a Jersey heifer). Butter is okay, but I really have to limit the milk/cream/cheese consumption. And sugar and starchy foods are completely out.