The article went on to recommend that you do your cardio first, then hit the weights.
If you cardio first, you generally tire your "stabilizing" muscles out; this can be a serious problem if your following workout involves squats/deadlifts and even bench(anything that really requires your "stabilizers" to work hard) that is in the 70-100% of your 1RM catagory
If you're sculpting your guns "Ron Burgandy-style", then cardio away brother!