Neck bridges are an exersise used to stretch and warm-up your whole body. First, you lie on the floor on your back, then you pull your feet as close to your butt as possible. Then you place your hands on the ground above your shoulders and "bridge" by rolling your weight onto the top of your head. My explanation probably seems hard to understand. There has to be someplace that shows pictures, maybe even on this website. I do neck bridges whenever I work-out.