Inhale as you lift your hips to create a straight line from shoulders to knees, with your knees aligned over the ankles and your wrists aligned under the shoulders. At the full expression of this position, consciously tighten every muscle in your body. Exhale, lowering your hips to starting position. Repeat. Benefit: Tones the buttocks, hamstrings, and quadriceps; opens the entire front of the torso; stimulates the sacral chakra.