It depends on the guy. Some need more cardio than others and some (very, very few) need very little. There are those with such gifted genetics when it comes to their metabolism that they don't have to diet as long or do as much cardio. But again, that doesn't apply to most. Anyway, you can do a lot to manipulate things with drugs, which is what a lot of guys do. Diet and cardio are important like everyone says but drugs are the single most important factor. Most don't like saying or admitting that but that doesn't make it any less true.