The cobra stretch is a core stretch that lengthens the abdominal muscles. It can also be used to mobilize and relieve stiff joints in the hips and lower back. This stretch is commonly used to prevent and alleviate cramps that occur in the torso.
The cobra stretch is performed by laying on a mat on the floor face down. Place your palms on the floor directly under your shoulders, almost as if you were going to do a pushup. Straighten your arms out while trying to keep your hips in contact with the ground. You should feel a stretch throughout your abdominal muscles and a slight tensing sensation in your lower back.