Key Muscles of Yoga: Scientific Keys, Volume I by Ray Long

Ray Long introduces the anatomy behind hatha yoga through three-dimensional color illustrations of muscles, tendons and ligaments. The first volume of Scientific Keys focuses on understanding muscular action rather than merely copying the outward appearance of a pose.

The discussion considers agonist, antagonist and synergist muscles and their roles in particular postures. It is a visual study reference for students and teachers interested in anatomical relationships within yoga. Illustrations do not establish what is safe for every individual, and this listing makes no guarantee about a particular printing or page count.