Kristen Butera, a professional yoga teacher and yoga therapist, is the co-owner of the YogaLife Institute in Wayne, Pennsylvania. She is the editor of the regional magazine Yoga Living. Kristen started studying yoga in the year 2000 and has since accumulated more than 3,500 hours of professional education in a variety of yoga styles and movement modalities. She specializes in training yoga teachers and yoga therapists and is the co-creator of the 250- and 500-hour Teacher Training programs and 820-hour Comprehensive Yoga Therapy training programs at the YogaLife Institute. Kristen is known for creating dynamic and interactive learning environments that empower students of all ages and levels to explore a variety of potential practices and apply yoga lifestyle principles toward living a richer, fuller life.

Staffan Elgelid, PhD, is a physical therapist, Feldenkrais practitioner, and yoga therapist with RYT-500 and C-IAYT certifications. Elgelid has presented internationally on a variety of topics and created programs on core strengthening, including the SmartCore Training DVD. He is an associate professor of physical therapy at Nazareth College in Rochester, New York, where he teaches soft tissue work and health and wellness. Elgelid is a faculty member for the Comprehensive Yoga Therapy training program at the YogaLife Institute. He has written several articles on yoga therapy for the International Journal on Yoga Therapy and Yoga Living magazine. He has extensive experience as a presenter and moderator at professional conferences and continuing education workshops. Elgelid is coeditor of Yoga Therapy: Theory and Practice, written for clinicians and scholars looking to integrate yoga into the medical and mental health fields.