Dan John, the Strength Coach and head track and field coach at Juan Diego Catholic High School in Draper, Utah originally said that the body is one piece and that there is no core. Mark Twight at GymJones took that to heart and filmed a bunch of “center oriented exercises” where movement was initiated from the center. Have a look

[youtube 628qphA1-8M nolink]

A previous video shows Dan John teaching Olympic Lifts