Ha, that is so me. Just in the last few months I've started getting some serious work done on the psoas and iliacus and it's made an ENORMOUS difference in both my running and my yoga. It's kind of intimate and very uncomfortable to have someone's fingers digging around in your abdominal cavity, so you've got to trust your bodyworker, but I can't even begin to describe what a difference it's made. Those muscles can be so tight and full of adhesions, especially in people who if they're not sitting, are working mostly in the sagittal plane. All the yoga in the world won't release adhesions - I could stay in Wheel all day long, but I couldn't get my right foot to stop turning out and I couldn't get my lumbar spine to bend at all in any direction. It's so different now!! Just last month I was able to get my sit bones on the ground in Staff pose for the very first time.

(But I still can't do Sundial. Although I got the closest I have yet the other day - now I don't remember how the teacher instructed getting into it, there are so many different ways and I seem to get along much better with some procedures than other.)