I have been thinking about doing some high-intensity training, but I am a little afraid of CrossFit and others like them. I would like to find something appropriate to my fitness/endurance level, and I want to make sure I’m doing it right and not hurting myself.
This article is quite insightful, explains what a “MetCon” is, and then goes on to explain how a 20-minute high-intensity workout might be counterproductive and how to choose an appropriate level.
The Case for the Short Metcon by Robb Wolf