In this 4 part interview, Dr. Spina, creator of Functional Anatomy Seminarsâ¢, describes his new soft tissue treatment and rehabilitation system FUNCTIONAL RANGE RELEASE⢠(F.R). In Part 3 Dr. Spina discusses Progressive Angular Isometric Loading (P.A.I.L.'s)â¢, a system of myofascial conditioning & rehabilitation utilized in the Functional Range Release⢠soft tissue management system.