The best foods for carb loading are high-carbohydrate, low-fiber, low-fat options that your body can digest quickly and convert into stored muscle fuel. White rice, white pasta, white bread, bagels, pancakes, bananas, and potatoes are the staples most endurance athletes rely on. The goal is to pack your muscles with as much glycogen as possible without causing digestive problems on race day.
Why These Foods Work
Your muscles store glucose in a form called glycogen, which serves as your primary fuel source during prolonged exercise. Skeletal muscle accounts for roughly 80% of glucose storage in the body, and after a hard training session, your muscles become especially efficient at pulling glucose in and converting it to glycogen. This process, called supercompensation, can push muscle glycogen levels up to about 4 grams per 100 grams of muscle tissue, well above normal resting levels.
The key enzyme responsible for building glycogen stays elevated for several days after exercise. That means your muscles are primed and ready to absorb carbohydrates at a higher rate than usual, but only if you give them the right raw material: easily digestible carbs that hit your bloodstream fast.
The Best Foods To Choose
Focus on refined, starchy carbohydrates and simple sugars. These break down quickly, keep your digestive tract clear, and make it easier to hit your calorie targets without feeling stuffed. Good choices include:
- White rice and white pasta: The classic carb-loading staples. A large plate of plain pasta with tomato sauce or a big bowl of white rice can deliver 60 to 80 grams of carbs per serving.
- White bread, bagels, and English muffins: Easy to eat throughout the day, especially with jam or honey on top.
- Pancakes and waffles: Made with refined flour and topped with syrup, these are calorie-dense and low in fiber.
- Baked or boiled potatoes: Peeled potatoes without heavy butter or cheese toppings are an excellent carb source.
- Bananas, melons, applesauce, and canned peaches: Fruit that’s low in fiber and easy on the stomach.
- Fruit juice and sports drinks: Helpful when you can’t face another plate of food (more on this below).
- Saltine crackers, graham crackers, and pretzels: Useful snacks to keep carbs trickling in between meals.
- Low-fiber cereals: Rice-based cereals with less than 2 grams of fiber per serving work well for breakfast or as a snack.
How Much To Eat
The standard target for effective carb loading is 8 to 12 grams of carbohydrate per kilogram of body weight per day. For a 70-kilogram (154-pound) athlete, that works out to 560 to 840 grams of carbs daily. That’s a lot of food, which is why choosing calorie-dense, easy-to-digest options matters so much.
To put that in perspective, a cup of cooked white rice has about 45 grams of carbs. Reaching even the low end of the target means eating the equivalent of 12 or more cups of rice in a day, spread across meals and snacks. Most people find it helpful to eat four to six smaller meals rather than trying to stuff themselves at three sittings.
You Only Need 24 Hours
The traditional advice called for three days of heavy carb eating before a race. More recent research has shown that trained athletes can store maximal glycogen in just 24 hours by combining a high-carb diet with physical inactivity. In one study, muscle glycogen increased by 90% within 24 hours and did not rise any further over the next two days.
This is good news if you dread days of force-feeding pasta. One full day of focused carb loading, paired with rest, is enough. If you prefer spreading the effort over two or three days at a slightly lower daily intake, that works too, but it’s not strictly necessary.
When Liquid Carbs Help
Eating 600-plus grams of carbohydrates from solid food alone can feel overwhelming. Liquid carbohydrate supplements, particularly maltodextrin-based drinks, offer a practical workaround. In a study comparing athletes who loaded with pasta and rice against those who replaced some of that food with a maltodextrin beverage, both groups stored the same amount of glycogen. But the group using the drink reported less gastrointestinal discomfort and preferred the experience overall.
You don’t need a specialty product. Fruit juice, smoothies made with banana and honey, or commercial sports drinks all contribute carbs without making you feel like you’re forcing down another plate of food. Mixing liquid and solid sources throughout the day is one of the easiest ways to hit your targets comfortably.
What To Avoid
Carb loading is not just about eating more. It’s about shifting the proportion of your diet toward carbohydrates while reducing fat and fiber. High-fat meals take up stomach space and slow digestion without contributing to glycogen storage. A cream-heavy pasta alfredo or a stack of buttery pancakes might seem carb-rich, but much of those calories come from fat.
Fiber is the other thing to minimize. Whole grains, beans, lentils, raw vegetables, and high-fiber cereals can cause bloating, gas, and stomach discomfort, exactly what you don’t want the morning of a race. This is one of the rare times when white bread is a better choice than whole wheat.
A few other common mistakes to watch for: trying new or unfamiliar foods the day before competition, underestimating how many grams of carbs you actually need (most people fall short without counting), and neglecting hydration. Every gram of glycogen your muscles store pulls in about 3 grams of water alongside it. This means you’ll gain 2 to 4 pounds of water weight during a successful load, which is normal and expected. It also means you need to drink plenty of fluids to support the process.
A Sample Day of Carb Loading
Here’s what a practical loading day might look like for a 70-kilogram athlete aiming for roughly 10 grams of carbs per kilogram (700 grams total):
- Breakfast: Two large pancakes with maple syrup, a banana, and a glass of orange juice (about 130 g carbs).
- Mid-morning snack: A white bagel with jam and a sports drink (about 90 g carbs).
- Lunch: A large bowl of white pasta with plain tomato sauce, white bread on the side, and fruit juice (about 150 g carbs).
- Afternoon snack: Pretzels or saltine crackers with applesauce and a maltodextrin drink (about 100 g carbs).
- Dinner: A large serving of white rice with a small portion of chicken, a bread roll, and canned peaches for dessert (about 140 g carbs).
- Evening snack: Low-fiber cereal with skim milk and honey (about 90 g carbs).
Notice the pattern: protein and fat aren’t eliminated, just kept small. The plate is dominated by refined starches and simple sugars at every meal. This isn’t how you’d eat normally, and it doesn’t need to be. It’s a one-day fueling strategy designed to top off your energy stores before a race that will burn through all of it.