If you missed this article by Joel Jamieson, it's worth reading:
Roadwork 2.0 - The Comeback
Joel Jamieson espouses the very old school idea of using steady-state cardio to improve aerobic conditioning for combat sports. Short version: he thinks you should do roadwork.
It's more common to see people training short-burst stamina in the gym to support their MMA fighting or get ready for a match. But Joel Jamieson has been arguing - with a lot of scientific basis - that you need an underlying base of aerobic conditioning to succeed in combat sports. This article also provides an 8-week framework you can use to organize your aerobic conditioning.
2 hours ago