If you run, you know that running tightens your hip flexors and lower back. There are certain yoga poses that focus on opening this areas. This yoga how-to video tutorial demonstrates how to do the scorpion pose. Scorpion is a yoga pose that's actually a balancing backbend. It's feels amazing on the front of your body and your spine, but it's a really difficult pose to get into, let alone hold long enough to get a good stretch. You can do it using a ball, but here's another way to do it, using a couch.