Ryan suggests steering clear of high-fat foods—such as creamy sauces, cheese, butter, and oils—as well as too much protein. Both nutrients fill you up faster than carbs and take longer to digest, she says. Pick jam instead of butter for your toast, tomato sauce instead of alfredo sauce on your pasta, and frozen yogurt instead of ice cream for dessert.
How Much Should You Eat?
You can’t completely fill your muscles with glycogen from just one meal, “which is why you should start carb-loading two or three days before your race,” Ryan says. Since you’re running very few miles, the glycogen will accumulate in your muscles. At this point, 85 to 95 percent of your calories should come from carbs, Katz says. Ryan recommends eating about four grams of carbs for every kilo of body weight. For example, a 70 kilogram runner should consume 600 grams—or 2,400 calories—of carbs per day.
During his research, Rapoport developed an even more precise formula that factors in variables including age, resting heart rate, VO2 max, and predicted finishing time. It’s important to keep in mind that you’re most likely not eating many more calories per day than you were during the thick of your training—it’s just that more of those calories are coming from carbs.
If you step on the scale while you’re carb-loading, be prepared to see a number that’s at least two kilos more than your usual weight. The extra weight mean you get a gold star for carb-loading properly. “With every gram of stored carbohydrate, you store an extra three grams of water,” Katz says. That means your body will be hydrated and fuelled as you start the race, ensuring you cross the finish feeling strong.
What a Day's Worth of Carbs Should Look Like
Here's an example of one day of carb-loading for an average 70 kilogram runner.
- 1 bagel with 2 tablespoons strawberry jam (71 g)
- 1 medium banana (27 g)
- 230 g of fruit yogurt (41 g)
- 230 ml orange juice
- 2 Muesli bars (29 g)
- 230 ml Gatorade (14 g)
- 1 large baked potato with 1/4 cup salsa (69 g)
- 1 sourdough roll (40 g)
- 230 ml chocolate milk (26 g)
- 1 large oatmeal cookie (56 g)
- 1 Clif Bar (42 g)
- 230 ml Gatorade (14 g)
- 1 chicken burrito with rice, corn salsa, and black beans (105 g)
- 50 gram bag of lollies (50 g)
Carb Total: 611 g
The Best Breakfast Foods for Runners
- Chicken breakfast sausage
- Natural uncured bacon
- High fibre cereal
- Natural whole almonds
- Steel cut oats
- Veggie and herb scrambled eggs
- Freeze-dried strawberries
- Organic berry smoothie mix
- Pancake waffle mix
- Harissa chilli paste
- Low fat Greek yoghurt
- Banana protein pancakes
- Sprouted grain English muffins
- Greek cream cheese
- Free range eggs
- Vegetarian breakfast sausage
- Organic cottage cheese
- Dark chocolate whole grain clusters
- Organic tortillas
How to Time Your Carbs
Here’s what to do before race day to ensure your tank is full.
6 Weeks Before: Practice Carb-Loading
Two or three days prior to your longest run, start eating more carbs and less fat and protein. “You’ll get a sense of what foods agree and disagree with your stomach,” Katz says.
1 Week Before: Make a Plan
“A plan is especially important if you’re traveling to a race,” Ryan says. Pack plenty of snacks, like sports bars, pretzels, and crackers, and check menus online and make restaurant reservations.
2 or 3 Days Before: Switch to Carbs
From now through your race, 85 to 95 percent of your diet should be carbs. You should also eat after taper runs. “That is when muscles are primed to store glycogen,” Rapoport says.
The Night Before: Don’t Stuff Yourself
Dinner should be relatively small, but carb-heavy. Eat on the early side so you have lots of time to digest. “You want to wake up race day hungry—not full from the night before,” Ryan says.
Race Morning: Have Breakfast
Three hours before the start, eat 150 grams of carbs, like a bagel and yogurt or sports drink and oatmeal, says Ryan. Early race? “Get up at 3 a.m., eat, and go back to bed,” she says.
This article originally appeared in Runner's World