Cardio is great for being healthy and all that but I only do it when absolutely needed. It works against you when trying to maintain muscle while losing fat. Besides, if you take enough fat burners your heart rate will be going just like you're doing cardio anyway.
I'm kidding of course (sort of). Cardio has it's place but I stay relatively lean year round so I don't have to rely on it for shows most of the time. A solid year round diet strategy (eating for purpose), cycled training designed with your goal for that phase of training, GH, DNP, T3 and Albuterol cycled during my cut phases help and cardio, if done is used in the beginning of prep and tapered off as things progress and substances are added. So on and so forth. It's a whole thing and it's obviously catered to me personally.