The move: Backstrom learned these core-killers from ultramarathoner Dean Karnazes and passed the exercise on to Sobolowski. Lie on your back, point your toes, and raise your feet a few inches off the ground, squeezing your legs together. With your hands behind your head, flex your pelvic muscles and lower abs, then contract your upper abs to bring your head, shoulders, and neck off the ground. Lower in a controlled movement; repeat.
The payoff: By keeping the range of motion small, you can focus on your entire ab wall, which, when strengthened, will help you pull your upper body forward, keeping you out of the backseat.