The CrossFit Journal | "Metabolic Conditioning"

"In the second issue of CrossFit Journal, "What is Fitness?" we explored the nature of metabolic condi- tioning, or "cardio", and highlighted some of the quali- ties of and distinctions between aerobic and anaerobic exercise, and touched on interval training. In this issue we'll reexamine metabolic and interval training in a little more detail." - Greg Glassman