Popsugar Fitness Workouts No-Equipment Ab Workout 3 Incredible Abs Exercises From Blogilates Founder Cassey Ho October 28, 2015 by Self View On One Page Photo 2 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Crisscross Reps: 20 When twisting, imagine you’re bringing your opposite shoulder and knee to touch. Do 20 reps, alternating directions with each rep. Previous Next Start Slideshow WorkoutsPilates