Anyone see this?
Science of Running: Crossfit endurance, Tabata sprints, and why people just don’t get it

The author expresses his disdain for cross-fit, and claims they misunderstand the concept of tabata sprints. Also sticks up for conventional running.

When one is talking about 'chronic cardio' how do you guys define it? Is a 30 minute run at a moderate pace "chronic cardio"? Or is the idea that if one eating primal, and sprinting once a week or so, then a 30 minute brisk walk will have the same benefit on the body?