I like the idea of having a crest or shield of some sort. I really like the layout of the Army's ROTC badge. I think an Animal twist on it could be really cool.
http://www.bayonet.net/clip_art/images/rotc.jpg
I'd change it to a sheild, you know, a point at the bottom, but keeping the same area. I'm thinking maybe a barbell through the middle, the A logo, and maybe a 45# plate. Because the top would still be flat, put Animal in the area where "leadership" is. Either have it yellow/black, red/black, or white/black.
The in BIG letters, have A B C, with the Universal bodybuilder on either side of the sheild.
Then on the back of the shirt write out Animal Barbell Club.
Sorry I couldnt do this on a program. I dont know of a free one where I can do all this.