Well...'MuscleHedz' cartoons came out in the early 1990's. Those cartoons are sooo old. We grew up seeing them in FLEX over 10 years ago.
How much does anyone want to bet that 'SHUTUPANDTRAIN' has a coveted 'Animal' shirt he wears to the gym with 'shut the '#*$%' up and TRAIN' on the front. Hahaha!
Probably uses 'Animal Pak'.