Here are some great psoas muscle stretches. If I feel like the muscle is making my back tight, after sitting long hours, this muscle is tight and shortened. If we stood up every hour and just brought our leg behind as far as comfortable, we then look away from the leg (rotate a little). Hold for 30 secs. Whew! Hip pain just slips away! Try it and don’t make it even that big of a step back. Use a wall to keep your balance. This is why SITTS helps so much because it opens the hips.