Bag work = 10 x 3minute round of full force is good.
Mitt work = 10 x 3 minute round targeting and moving
Thai pads = 10x 3 minute rounds move and kick

all these = good cardio.

plyometrics are also good as is running either on the street or on a treadmill.

There's lots of stuff you can do. I'd say that the bag work will get yoru breath and blood up faster than running will.