I would look at a sprinter and look at a marathon runner - both have fairly low bodyfat, which do you want to look like? So a sprinter trains hard with weights and does short burst or interval style cardio (you don't necessarily need to or want to run at 100% but certainly at a fast pace which can't be maintained for more than a limited time period i.e. not 30 minutes - look up HIIT or interval training). On top of that there is diet, to drop fat you must consume less than your body and it's activity levels require. It's not any single facet - it's all the facets coming together to create the animal.