Description from YogaWorks: This powerful and effective flow fusion class is a hybrid of yoga and core strengthening moves. Our core is our center physically, emotionally, and mentally. Stoking the fire in our belly, creating strong abs and a strong spine is vital to being healthy. Planks and all kinds of ab and spine strengthening moves will stimulate the prana in your navel center. Focus is on deep abdominal work along with upper and lower body strengthening and lengthening. This class is an excellent complement to your regular yoga practice. It is not heated.