Can’t say anything about the 5 Rings, but I had collapsed arches until I did a series of poses from Pete Egoscue’s Pain Free: A Revolutionary Method of Stopping Chronic Pain. I had serious back pain for eighteen years. As a side effect of doing Egoscue’s poses, I lost my flat feet. One of the causes were with improper hip alignment. When I laid on my back with my feet (pointed toward the ceiling) on a card table chair, thighs vertical, calves horizontal, I could feel my arches “drawing up.” I love to look at the imprints of my wet feet when I come out of the shower. Awesome. One of the most important books in my life, for which I am deeply grateful. Yes, and I healed my back or my back was able to heal itself when it was properly aligned.