Today I learned why it is not a good idea to wear cheap ($10) sandals from Target while riding a bike. Although I only went ten miles, I found they offered little if any support and were too flexible. I guess they make bike shoes for a good reason! (I usually wear my biking shoes, which are ancient -- they look like bowling shoes.)
I had hoped the fresh air would feel good on my feet. It did, but I hated the flexibility and loss of pedal power.
What did you learn today?