I’ll make a comment here…. To explain a little bit - Bone Strength =Bone Density + Bone Quality
From what I’ve read and studied, and it’s been a lot, and from McCormick’s book over this past 9 months 🥴 The DEXA measures cortical bone. The outer hard layer of bone. The TBS Trabecular Bone Score refers to the bone quality.( Having both tests gives you a clearer picture of what’s going on -And mind you to get a TBS test is no easy task as many endo’s feel it’s of no use.) The TBS measures the quality of softer spongy parts of the vertebrae, and a little of what’s in one of the hip measurements ..ie in the femoral neck. You can understand how your spine needs to be hard but yet flexible so we can move the way we do. That’s different than what your long bones like in your legs or arms are made of - hard, cortical bone. ( That is probably why the hard fall that one took in her arm only resulted in a sprain - that was hard cortical bone) So to explain why that person who changed her bathing suit in the car and fractured, is why and how I fractured last summer. She probably really flexed her spine in a forward motion in a way that for her was excessive of what her vertebrae could handle and she ended up with a compression fracture. The spine , and particular in my opinion, the lumbar area is at risk with that movement.
I hope that explains some of it in more layman’s terms. Good luck to you!! It is a lot to take in, but because I want to feel good about what I end up doing in my own situation, I really wanted to understand things for myself, and recently I did have an appt with McCormick, but as I drew nearer to that I wanted to have intelligent questions to ask him so I got the most out of my appt. It was great to meet with him!!!