Sadie Nardini is the creator of Core Strength Vinyasa Yoga and the co founder of The Fierce Club in New York City. Her vibe is straight up empowering. Her online yoga videos are designed to kick your asana and kill your core, in the sweatiest of ways. Sadie shares her core strengthening teachings as a contributing writer for GaiamLife.com. She has also been featured in The New York Times, Yoga Journal and Self Magazine. For more on Sadie www.sadienardini.com.