Writer and fitness expert Sara Ivanhoe demonstrates how to get a flatter and fitter tummy through yoga in this exercise video. Sara Ivanhoe: 20 Minute Yoga Makeover -- Flat Abs features a yoga-based workout routine that focuses on the abdominal area, which through a series of twisting and stretching exercises can help tone your abs, strengthen your back, and improve your posture. ~ Mark Deming, All Movie Guide