Lol, that's an idiotic statement.
Are you calling me an idiot?
Okay, you must not be a bodybuilder. Almost all bobybuilders due low intensity, long duration cardio so they don't "burn up muscle".
LOL. I must not be a bodybuilder? Okay, "Oldschool". Yes, you are correct. Most bodybuilders today do, not "due", but do low intensity, long duration cardio. So what? Does that make it better? Has weight training not evolved since the 50s? Will cardio training not evolve too? Being old school can be good, but being ignorant is not. Low intensity, long duration cardio is better for endurance trainers. I did not say it was not good at all for bodybuilders, just not the best.
Bodybuilders increase their metabolism by increasing their "muscle mass".
True, but increasing muscle mass is not the only way to increase your metabolism. Bodybuilders increase their metabolism in many different ways, nutrition, increasing muscle mass, etc. Building muscle mass is a slow process. High intensity cardio is a quicker way of speeding up your metabolism.
Dude are you a certifed trainer?
No, I am not an ignorant certified trainer. I do consulting work for the government, engineering, software development, computer network security, etc. I just happen to love bodybuilding and nutrition too, and I've been training non-stop and also competing for the past 24 years.
Oldschool Flip, I'd advice against going online and insulting people you don't know. Please don't be so ignorant as to think that in an era of cyber warfare, you are perfectly safe behind your computer monitor and behind your keyboard. If you piss off the wrong person here, you better have the huevos to accept the consequences.