LET LOOSE ON OUR T-SHIRT DESIGN

We are an old fashioned, grass roots, fighting gym - boxing - kickboxing - muay thai producing International & Australian champions.
Think of the original Rocky gym or Million Dollar Baby and you could be picturing us!

This t-shirt is for people joining our Extreme8 ( 8 week fitness challenge)
It needs to caputure the attention of people walking by our group while they are running or training outdoors, as well as make those wearing it feel part of the TEAM
The type of training they will be doing is crossfit, and functional strength. look crossfit up on google for more info. Its pretty hard core!

The design must be suitable for a black base t-shirt.
It can use white plus only 1 other colour possibly a vibrant blue or red but Im open to suggestions from designers.
It needs to be quite masculine and tough looking - alittle like an CROSSFIT style shirt.
The back of the t-shirt is probably the most visible area.
Maybe something around the front following the neckline would also be good.
The t-shirt we're using has no side seams.
Details that need to be on it:
Name: Extreme8
Saying: Fitness with a purpose