◎ Join the millions completing the Zen Challenge Series! ◎ 0 to 200 Situps in 8 weeks! ◎ Get those coveted 6-pack abs! ◎ Featured on Glamour Magazine, Yahoo! 's Appolicious, Popsugar Fitness, Apple's "What's Hot", Apple's "New & Noteworthy", and doctor recommended on healthTap! "I've tried tons of different ab workouts, but this one was my favorite.