Think about your core as a cylinder. Connect to all parts of your "cylinder" with this flow practice that emphasizes strengthening the muscles that work with the sides and back of your core. Anatomy nerds, think obliques, quadratus lumborum and erector spinae. Non-anatomy nerds, think love handles! Move through a series of poses like sphinx to plank, vasisthasana variations and navasana, working your outer hips and glutes as well as your core.