Originally Posted by Rajah
Don't cut off a quote of mine please, you don't get the true meaning of what I said. Steroids stress the heart, period... bodybuilders (many of which are close friends of mine) don't run or do any strenuous cardio because it adds extra stress to the heart. This is known to cause enlargement of the heart possibly leading to heart attack.
Running will eat away at your muscle only if you run miles at a time, not by doing HIIT or short wind sprints.
BTW, this is FACT, I'm not making it up.