Athletes see each meal as an opportunity to refuel—How much protein can I fit into this meal? How can I add more good fats? —because it’s what drives their performance. Nutritionally void foods like artificial sweeteners have no place in their diet. Not only do they offer no health benefits, but consuming artificially sweetened foods like a can of diet soda per day could significantly increase your risk for health problems and weight gain, says a study out of Purdue University. Artificial sweeteners trick the body into thinking it’s consuming real food, and because they’re over a hundred times sweeter than the real thing, your body starts producing insulin (the fat storage hormone). You’re better off consuming the real stuff in moderation.