Bernie Clark author of the best selling The Complete Guide to Yin Yoga, has had a passion for science, health, sports and spirituality since childhood. He has a degree in science from the University of Waterloo and spent over 25 years as a senior executive in the high-tech/space industry. Bernie has been investigating the path of meditation for over three decades and began teaching yoga and meditation in 1998. He conducts yoga teacher trainings several times a year and aims to build bridges between the experiences of yoga and the understandings of modern science. He is creator of the YinYoga.com website. Bernie lives and teaches in Vancouver, Canada.

Paul Grilley, creator of the influential DVD Anatomy for Yoga, began practicing yoga in 1979 after reading "The Autobiography of a Yogi" by Paramahansa Yogananada. He moved to Los Angeles in 1982 where he studied and taught yoga for 12 years. His special interest is the teaching of anatomy. He is the initial popularizer of the style of yoga called yin yoga, and patterns his philosophy on the writings and researches of Dr. Hiroshi Motoyama a yogi and scientist from Tokyo, Japan. This philosophy integrates the Taoist meridian and acupuncture theories of China with the yogic and tantric theories of India. Paul started his studies of anatomy with Dr. Garry Parker in 1979. He continued his studies at UCLA where he took courses in anatomy and kinesiology. He earned a M.A. from St. John's College, Santa Fe in summer 2000 and an Honorary Ph.D. in 2005 from the California Institute for Human Science for his efforts to clarify the latest theories on fascia and its relevance to the practice of hatha yoga.