Quote Originally Posted by donjitsu2 View Post
I've had similar stuff happen to me on a few occasions.

Stretching your hip flexors and doing extra ab work seems to help as well.
What he said! As someone who has lower back issues I find that doing yoga's pigeon pose works great for hip flexors and glut stretch...I'd also suggest some mat stretches on your back that have worked...bring your knees into your chest and do some slow circular motions in both directions. Then bring one leg up, pull knee into your chest and gently pull it across your body until the knee touches the mat, a trunk twist that may be effective in loosening up that muscle group.

Just some suggestions from the peanut gallery.