Turn Up Your Fat Burn: Go from frustrated to fit with our revolutionary 4-week weight-loss program!A fresh and successful way to shed pounds in record time, Turn Up Your Fat Burn! by Alyssa Shaffer and the Editors of Prevention magazine uses a two pronged approach to weight loss. Based on two breakthroughs in exercise science, it focuses on increasing metabolism and improving one's ventilatory threshold (the point at which the body stops burning carbohydrates and starts converting fat stores into energy) to help readers at all fitness levels reach