This is a great lower-back stretch, but the configuration of the legs also creates a nice stretch for your glutes.
- Lying on your back, extend your arms out to your sides. Bend your knees, and cross your right leg over your left.
- Slowly rotate your knees to the right, allowing them to come to the floor. It's OK if your left shoulder comes off the floor. Hold for 20 to 30 seconds, then slowly bring the knees back to the center.
- Repeat on the other side, crossing your legs so the opposite leg is on top and twisting in the other direction.