This textbook describes the author’s concept of functional kinetics and presents her theory concerning the systematic observation and analysis of human movement. The purpose of functional kinetics is to improve observation, analysis and instruction of human movement. The physiotherapist must be able to analyze movement in order to find and define the functional problem. He must be able to effect the required change in movement, whether through manipulation, instructing the patient how to move or both. The ideas outlined in this book are basic to physical therapy and rehabilitation and should be familiar to active therapists.