No, really the cramps just started recently. About the same time I pushed my saddle forward. I don't get them standing on my toes (but maybe I would if I stood on my toes for an hour and a half, since they really don't start until mile 25 or so).

Hadn't talked to the doctor, mostly because it was only really happening on the bike. Over the winter I'd been getting an occasional charley horse, but I'm pretty sure that's because DH put my SmartWool socks in the dryer and shrunk them At any rate once I started wearing looser socks to sleep, those cramps stopped.