I get this a lot, too, and I ride in trainers. I was in running shoes one day and I realized that the sole of the shoe was bending around the pedal - no support at all! Another day, I'd changed into my shorts and shirt only to realize I'd forgotten my shoes. All I had to wear on my feet were the Birkenstock sandals I'd been wearing all day, so I rode in them. They have a much stiffer sole and are wider than my trainers, and I had absolutely no foot pain at all on that ride.
DH just ordered me some Sidi shoes so I can go clipless. They'll be here in a few days. I'm looking forward to trying them, and riding more effiiciently, and, hopefully, pain-free in the tootsies.
Roxy
Getting in touch with my inner try-athlete.