Since fall of 2011, I've been including ball rolling into my yoga sessions with wonderful results and feedback. To expand further on all of the questions after a ball rolling session, here's more information for you! *I learned these methods initially from my friend, massage therapist, yoga teacher, Kristine Karpinski in the summer of 2011. She was greatly influenced by the work of Yamuna Zake, www.yamunabodyrolling.com In September 2011, I brought the balls to my classes and learned from my students how to integrate this therapy into practice. I've taken occasional workshops with local YTU teachers, and Jill Miller, the founder of www.yogatuneup.com. YTU is a very comprehensive system based on anatomy knowledge and compassion. I continue to learn from both Yamuna and Jill Miller through their abundant internet resources. *Rather than expensive and specific yoga therapy balls, I use playground balls, 6" in diameter, that I've deflated to half so they ca