Acclaimed fitness guru Denise Austin offers innovative ways to get in shape, courtesy of two invigorating 20-minute workouts. In "Power Yoga," Austin takes you through a series of challenging poses designed to generate power and stamina. In "Power Pilates," she puts the core muscles of the abdomen through the wringer and tones the butt, hips and thighs, also incorporating 3-pound weights to work the arms, chest and shoulders.