In fitness context one often hears the statement: "Abs are built in the kitchen". Which means that you have to follow a very clean diet (together with a proper workout) to get visible ripped abs. For example if you have a look on the female fitness model interviews on simplyshredded.com you see that all of them follow a very restrictive diet. And even most of them have a very low carb diet and high protein diet.
Now I am interested in some background info's about the case of olympic athlets. Regardless of whether you consider track and field athlets like Jessica Ennis, gymnasts, divers, soccer players etc. there are many of them with really ripped abs. Sometimes it is said that you can eat everything what you want as a olympic athlet because you are training so much that you burn everything away. Is this statement true? If this is the case, is the training for example of an olympic 100m sprinter such more intense and burns such much more calories than that of a professional fitness figure model (which seems to train every day some hours).
How differs (especially concerning the restrictiveness of the diet) a typical diet of an olympic athlet with ripped abs from that of a professional fitness figure model and why?