Race Day Nutrition: The Complete Guide to Fueling Peak Performance

A Sports Nutritionist’s Guide to Fueling Your Best Performance

By Barbara Lewin, RDN, LDN
Sports Nutritionist and Functional Dietitian

You’ve put in the miles. You’ve completed the long workouts. You’ve followed your training plan. But if your race day nutrition isn’t dialed in, you could leave your best performance at the starting line.

As a sports nutritionist, I’ve seen athletes train for months only to struggle on race day because they skipped breakfast, tried a new energy gel, or underestimated the importance of hydration. The good news is that with the right fueling plan, you can give your body the energy it needs to perform at its best.

Race Day Nutrition Starts the Day Before

Your race day nutrition doesn’t begin on race morning. It starts the day before.

Your muscles store carbohydrates as glycogen, which is your body’s primary fuel source during endurance exercise. Eating enough carbohydrates the day before your race helps maximize these energy stores so you’re ready to perform your best.

Choose familiar carbohydrate-rich foods such as rice, pasta, potatoes, oatmeal, fruit, or bread. Avoid overeating and don’t experiment with new foods the night before your event.

What to Eat 2 to 3 Hours Before the Race

Aim to eat your main pre-race meal about two to three hours before the start.

Choose foods that are high in carbohydrates, moderate in protein, and low in fat and fiber to help reduce the risk of stomach upset.

Some good pre-race meal ideas include:

• Plain pasta with a small amount of grilled chicken
• Pasta with marinara sauce
• White rice with scrambled eggs
• A bagel with jam and a banana
• Toast with jam and a banana
• Applesauce with a bagel

Every athlete is different. Practice your pre-race meal during training so you know exactly what works for your body before race day.

Hydration Can Make or Break Your Race

Starting the race well hydrated is just as important as eating the right foods.

Drink fluids throughout the day before your race and continue sipping fluids on race morning. If you’re racing in hot or humid conditions or tend to sweat heavily, replacing sodium is just as important as replacing water.

For more information, read my article, The Best Electrolytes for Athletes: Improve Hydration, Recovery, and Performance, where I explain how to choose the right hydration strategy based on your individual needs.

If you’re competing in hot weather, you’ll also find practical tips in my article, Training in the Heat: How to Stay Safe, Hydrated, and Perform at Your Best.

Practice Your Race Day Nutrition

One of the biggest mistakes athletes make is waiting until race day to test their nutrition plan.

Practice everything during training, including:

• Your pre-race breakfast
• Sports drinks
• Energy gels or chews
• Electrolytes
• Your hydration schedule

Nothing on race day should be a surprise.

Fuel During the Race

Whether you need to eat during competition depends on the length and intensity of your event.

For shorter races, water may be all you need.

For endurance events lasting longer than about 60 to 90 minutes, consuming carbohydrates during exercise can help maintain energy and delay fatigue.

Sports drinks, energy gels, chews, bananas, and other easily digested carbohydrate sources are all good options. Again, practice your fueling strategy during training so you know what works best for you.

Recovery Begins at the Finish Line

Your recovery starts as soon as you finish.

Within 30 to 60 minutes, eat a meal or snack containing carbohydrates and 20 to 30 grams of protein to begin replenishing glycogen stores and repairing muscle.

Continue replacing fluids and electrolytes throughout the day, especially after long races or events held in hot weather.

Common Race Day Nutrition Mistakes

Even experienced athletes can make mistakes that affect performance.

Here are some of the most common:

• Skipping breakfast because of pre-race nerves
• Eating too much fat or fiber before the race
• Trying a new sports drink or energy gel
• Drinking too much plain water without replacing sodium
• Waiting too long after the race to eat

Avoiding these simple mistakes can help you perform better and recover faster.

Every Athlete Is Different

There isn’t one race day nutrition plan that works for everyone.

Factors such as race distance, weather conditions, sweat rate, body size, gastrointestinal tolerance, and training intensity all influence your ideal fueling strategy.

That’s why I encourage every athlete to practice their nutrition just as they practice their workouts. By race day, your fueling plan should feel as familiar as your running shoes or bike.

The Bottom Line

Every successful race begins with a plan, and your nutrition plan is just as important as your training plan.

The right race day nutrition strategy can help you maintain energy, stay hydrated, reduce the risk of stomach problems, and recover more quickly after your event.

Ready to take the guesswork out of race day nutrition? During my Special Introductory Session, we’ll develop a personalized fueling and hydration plan based on your sport, race distance, sweat rate, training schedule, and performance goals. You’ll know exactly what to eat, what to drink, and when to fuel so you can step up to the starting line with confidence and perform your very best.