He was awarded an honorary Ph.D. by the California Institute for Human Science for his work on the relevance of fascia, the sheets of connective tissue that hold the body together, to the practice of yoga asanas.[11] From his knowledge of anatomy, Grilley states that it is not possible for everyone to do all asanas, because of variations in the shapes of specific bones; for example, some people have a much longer neck on the femur (thigh bone) than others, giving them, he argues, greater freedom of movement in the hip joint.[13] He has been interviewed and featured in magazines including Yoga Journal[13] and Elephant Journal,[14] and in chapters of books such as Victoria Bailey's 2012 Sharing Sadhana: Bailey describes him as both spiritual, as seen in his DVD on Chakra Theory and Meditation, and knowledgeable about the anatomical basis of yoga.[15] In 1984, Grilley married Patti Davis, daughter of US president Ronald Reagan.[16] He then married Suzee Grilley (born 1959); she is a Registered Yoga Teacher who has also taught Capoeira and modern dance.