HOW: Place a foam roller on the ground long ways and lie down with it along your spine. Your head, upper back, and hips should all be supported on the foam roller in this position. Place your arms at your side and let gravity pull them down to a comfortable resting position. Slowly raise your arms above your head and back down, like making a snow angel in the ground. To intensify the stretch, you can actively try to push your elbow and/or hands even closer to the ground as you move them up and down.
FEEL: You should feel parts of your chest and shoulder stretching, depending on what is tight and where your arms are positioned.
COMPENSATION: Do not let your lower back arch during this exercise. Keep all 3 points of contact (head, upper back, and hips) with the foam roller at all times.