Workout with Karlie Kloss and maybe you can have great abs like her :) This “four point” position begins on your hands and knees. 1. Keeping your back straight, extend your left leg behind you and then pick up a water bottle with your left arm and hold it forward at the same time. Slowly pull the leg and arm in toward your core simultaneously in a crunch that targets the obliques before returning to the extended position. Start with 5 reps and build to 15 for all exercises in this series, before switching to the opposite side. 2. Assume a plank position with your butt slightly raised to protect the back and knees. Move your knee toward the stomach in a straight line, initiating the movement from the lower abdomen and thigh before returning to original position. Make sure that your knee doesn’t go past the waist. 3. This exercise is similar to the one above, except you will change the angle of your torso slightly as you move, pulling your thigh toward your mid-belly section to create a slight twist that works the sides of the abdomen and obliques. Work slowly and maintain resistance to be effective. 4. Begin from the same plank pose above. Then perform a controlled series of side-to-side rotations by pulling one arm up into a tight, bent reverse L-shape position. Place the arm down between twists with limited force—just enough to activate the chest—and keep the movements small. Then switch sides to continue working the upper abdomen. From a plank position, you are going to perform a slow forward reach using your stomach to control the movement. Make sure you are balancing on the toes to protect your body from falling. Then, raise the arm straight out and up to shoulder level, engaging your core and being careful not to propel your torso forward as you perform the exercise.