This is a video by Greg Glassman on the purpose and logic behind the development of CrossFit. Not  only is the method of CrossFit effective, safe, and empirical (evidence based and scientifically backed) but it also appeals to the logic of the doctor, the average joe, and the fitness trainer alike. Please take the time to watch both videos and deepen your understanding of what *PART* of Paradigm's purpose is. Develop long term health and increasing work capacity.

 

This is part 2, 20-ish minutes...