Hi all, I've been trying to run around 30 minutes most days (at least four times / week) on the treadmill - barefoot and not particularly hard. I also did a tiny barefoot run over gravel and pavements the other day. In a normal week I'd run maybe two or three times, in minimalist and outside in a wooded area, so my habits have completely changed. Yesterday (after treadmill), I noticed a sort of "bruised" feeling on the sole of my foot, right at the front, just between the big and second toe. It's gone away really quickly. Is it just the muscles / skin / nerves adjusting, or is it bad technique?