You will get down on your hands and knees. Then you will alternate between arching your back up with your head down (cat pose), and letting your back arch back down with your head up (cow pose).
Stand up with your feet set slightly wider than your shoulders. Then raise your left arm up and sideways over your head. At the same time reach down with your right arm and bend your upper body down to the right hand side. Repeat this on the other side.
Lay back on a bench or ball with either hitting the middle of your back. While your feet rest on the ground, raise your hands over your head then letting the weight of them fall and stretch your body.