Ive always been interested in minimal shoes, after of plenty of research and shoe testing i finally purchased a pair of new balance minimus mr00, and i love them. Ive ran 3 runs this week, total mileage 15 miles, more than id originally planned. I found myself constantly focussing midfoot striking. As result the day after my third run i could barely walk due aching calf muscles. Never realised the results to your lower leg muscles. Short term pain, long term great results (hopefully)