Wide Child's Pose is one of those stretches that makes me feel good all over. I know it really targets the lower back, but I also feel like it helps lengthen my posterior muscles, my spine, and decreases tightness in my upper body. I also like this pose because I really feel a stretch in my hips. I hold this pose for as long as I need, which can be anywhere from 30 seconds to a few minutes.
While on your hands and knees, sit back between your heels, exhaling as you lower your belly between your knees, coming into a Wide Child's Pose.