I've lost weight w/o doing cardio. I adjusted my diet (the most important thing) and started lifting a lot heavier than I used to. I started with the stronglifts.com website and started looking at intermittent fasting (Brad Pilon, Martin Berkhan). I've also starting reading stuff by Lyle McDonald.
Circuit training is tougher, but you won't be as bored and you might see some strength gains (especially once you are able to add a little more weight on subsequent workouts).
Last edited by josephr25; 03-26-2011 at 12:20 AM.