Some circuit training would be beneficial, but mostly it should be cardio. Almost any normal person with the right diet and cardio can achieve great results. I used to be a runner, and I could lose 20lbs in a month if I went hardcore. I didn't do ANY for a year to go from 170 to 220lbs. Now I'm running again and taking ECA and weighing in just over 200 - the first fat to go was the waist, legs, ass.