Chi Running

I've been reading the book and today was the first day I started to implement some of what I'm learning. I focused on the first of 4 steps, my form. I tried to make my column (core) strong and straight, and it was harder than it sounds. After 8 babies my abdominal muscles are very weak, and just a few minutes into it my abs were starting to ache. My legs did much better though. My shins and knees didn't hurt until the very end.