Popsugar Health & Fitness Workouts Lower Ab Exercises These Lower Ab Exercises Will Make You So Sore, It'll Hurt to Laugh! 7 March 2018 by Jenny Sugar View On One Page Photo 20 of 23 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 20 T-Cross Sit-Up Begin lying on the floor with your arms out wide to the sides, making a T with your body. Sit up lifting your right leg, and twist to bring your left hand to your right toes. Slowly roll back down, and repeat on the other side. This completes one rep. Previous Next Start Slideshow WorkoutsAb Exercises