The bulk/cut approach holds that you can either add muscle or lose bodyfat, and that all training should be concerned with one or the other. This assumes that aesthetics is the criterion by which progress is measured, that pictures therefore tell the story, and that picture magazines can be the arbiters of success. This type of thinking completely ignores the performance aspects of training, and performance is much more easily and rapidly influenced. Rapid, quantifiable progress keeps motivation high, much higher than waiting for a six-pack that may or may not show up. — Coach Mark Rippetoe