That would be me posting about my new shoes. More testing is needed, but I've been ill. Remember, my old shoes were way too large, so I very well could have been getting cramps from that. And even with sneakers I do better with ones that have some kind of arch support, so these appealed to me. The reason it really struck me that I didn't have cramps after the 50 mile ride was because I knew I was dehydrated and with my old shoes I could cramp up within 30 minutes. I did try to really concentrate on keeping my heels down while I was riding, too, so I guess it could be any number of things that reduced my pain. But a proper fitting shoe probably helped.