@Blueberrybook I don't think it's a muscle relaxer, but I could be wrong. One main use of it is to help with movement caused by Parkinson's. I saw your shoe question too: I absolutely love the Nike Pegasus line. They are a bit pricey though. I'm currently trying out the Nike Revolution because they are much cheaper. So far, so good. But, all I've done in them is some walks and day to day use.