Get firm, flat abs fast with this exercise program from &NFi;Self&NFi_; magazine, the women's health and well-being resource. Fitness experts designed this program that combines yoga, Pilates and standing abdominal and stability ball exercises for sculpting a lean, strong middle section. The fun, easy-to-follow exercises are appropriate for any fitness level. In as little as four weeks, you'll be wearing those trendy, belly-revealing shirts with confidence!