We begin here with an introduction to the study of tension flow rhythms, its historical background, and the contributions of other researchers. We then turn to the Tension Flow Rhythm Diagram, how it is structured, and the components of tension flow rhythms, bound and free flow. The main body of this section will be devoted to the oral phase which roughly coincides with the first year of life (including prenatal experiences). We also invite you to take advantage of viewing the KMP video project on the https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9781351038706/b09b779a-831b-4bae-9426-e6babdffdd00/content/www.kestenbergmovementprofile.org">kestenbergmovementprofile.org website where you can observe tension flow rhythm patterns that we describe in this chapter (www.kestenbergmovementprofile.org/video.htm).