Two days later and my feet are sore!

Feet, calves, hamstrings and groin. I figured this much but I didn't expect the groin to be sore. I've never experienced soreness in the adductors from running before and I'm not sure how this relates to barefoot training.

I also have a little soreness in the left heel but this feels like a bruise. I'm pretty sure it was that first heel strike when I set off to run as I don't remember stepping on anything that would have caused it. I do remember my stride changing almost immediately from what I am used to (heel striking as with shoes).