With CMT I do know that you can have high arches, normal arches, or be flat footed. Or you can have a high arch on one foot and be flat footed on the other, etc. It depends what muscles are affected.

There are so very, very many types of CMT that it would be hard to say. And so many other peripheral neuropathies out there. DNA blood testing, very expensive, might give you an answer.

I know that low creatine can cause muscle weakness. However, with CMT we have muscle weakness, atrophy, etc. already. So it seems creatine does not enter into the picture for CMT. IDK