As number 5 of the dreaded/loved Abdominal 5 series this exercise culminates the series to target several areas of your core at once. Your upper abs, lower abs, transverse and obliques all fire when done properly. If you can only fit one exercise in your day to help stregthen your core this is a great one!
Part One: Lying on your back draw one leg out 45 degrees off the floor or higher and the other knee drawn in towards the chest. With the hands behind the head and head high off the mat cross the elbow towards the knee.
Part Two: Staying high in an upper ab curl, switch to the other side. Repeat 8-10 times on each side.
Be sure the belly is drawn in towards the spine and the shoulders stay away from the ears. Keep the inner thighs active as the legs brush past each other to switch.