Have you seen 'Combat Mission'?
A show from sometime in the early 00s rather similar to this. Don't know how known it actually is, but I haven't anyone talking about it.
It is about 20 or so elite operatives (marines, delta, green baret, seal, swat ect) competing over the entire show to be the best warrior.
The show has more of a military theme to it than One Man Army, since half of the tests are actual military or swat type missions (assaults, ambushes, MOUNT, CQB), the other half are mainly physical tests.
The whole show is on youtube
Episode one part 1
http://www.youtube.com/watch?v=KE8XZxNgwtA
Haha made you look!