The Psoas Book is a comprehensive guide to the Iliopsoas muscle and its profound influence on the body, mind, and emotions. Easy to read, The Psoas Book focuses on the psoas (so-as), the core muscle of the human body, and is an essential read for anyone interested in health, wellness, and movement.The Psoas Book is a great resource for the layperson and offers simple self-help approaches for eliminating low back, knee, pelvic, and hip tension. For the professional, it is a one-of-a-kind educational resource, and is a required read at numerous university dance and movement education programmes, massage schools as well as yoga, Pilates, and fitness training programmes. Purchased for over 30 years by laypersons and professionals alike, the new 30th anniversary revised edition of The Psoas Book is also a must read for anyone interested in sports, martial arts, somatic education, psychology, voice, nursing, birth, labour, and child development.