Yawning after years of not being able to

This happened a while ago, but I wondered whether others also had similar experiences. It's basically what the title says. My trauma kinda sat in my ribcage, or maybe muscles in general, I'm not sure about that. But it was the case for years that I couldn't take a deep breath or yawn because my muscles were so tense that my ribs couldn't move enough. And then once I started really processing the trauma I noticed that I started yawning again. Not every time, but bit by bit it came back and now I'm at a point where I know how to relax my ribcage when I feel it tensing up, so it's not really a problem anymore. Has someone else experienced that too?