What You Need to Know
Fueling for endurance events pushes your body to its limits, hours of exertion, thousands of calories burned, and the constant battle against fatigue. Whether you’re tackling a marathon, triathlon, or an all-day cycling event, how you fuel your body can make or break your performance. Let’s break down the essentials of endurance fueling so you can go the distance without hitting the dreaded wall.
The Big Picture: Why Fueling Matters
Ever heard of “bonking”? Coach Seacat of Absolute Endurance says it’s that dreaded moment in an endurance event when your body runs out of fuel, and suddenly, every movement feels impossible. Your body relies on glycogen, stored carbohydrates in your muscles and liver, for energy. But there’s a catch: you only have about 90 minutes’ worth of glycogen at a high effort level. After that, you either refuel or slow down.
So, how do you keep your engine running strong? A combination of carbs, hydration, electrolytes, and timing is the answer.
Pre-Race Fueling: Setting the Stage for Success
The Night Before
Think of your body as a gas tank. You wouldn’t start a road trip on empty, so why would you start an endurance event without topping off? The night before a race, aim for a meal rich in complex carbohydrates, think pasta, rice, or sweet potatoes, paired with a lean protein and healthy fats. Also don’t experiament with new foods! This isn’t the time to try the new Indian place or some dish a pro-athlete swears by.
Avoid: High-fiber and high-fat meals that might cause digestive issues.
Morning of the Event
Your pre-race meal should be easy to digest and high in carbohydrates. Aim for 300-500 calories about 2-3 hours before the start. Some solid options include:
- Oatmeal with banana and honey
- Toast with peanut butter and a drizzle of maple syrup
- A smoothie with fruit, yogurt, and a bit of protein
If you’re racing early and don’t have time for a full meal, a quick carb source like an energy bar, banana, or sports drink can help.
During the Event: The Art of Fueling
Carbohydrate Intake
For events lasting longer than 90 minutes, aim for 30-60 grams of carbohydrates per hour (and up to 90g for ultra-endurance athletes). This can come from:
- Energy gels (about 20-25g per gel)
- Sports drinks (15-20g per 8oz)
- Chews or gummies (20-30g per pack)
- Real food (bananas, rice cakes, honey sandwiches)
Mixing up sources can help prevent flavor fatigue and stomach issues. Need a more detail guide? Here is a much more in-depth guide to endurance nutrition.
Hydration and Electrolytes
Dehydration is a performance killer. Losing just 2% of your body weight in sweat can lead to decreased endurance and mental fog. General hydration guidelines:
- Drink 16-24 oz per hour, adjusting for temperature and sweat rate.
- Electrolytes are key—especially sodium, potassium, and magnesium. Use electrolyte tablets, sports drinks, or salty snacks to replenish what you lose in sweat.
Pro tip: Don’t wait until you’re thirsty to drink. If you are already feeling thirst it is too late. Sip consistently throughout the event.
Common Fueling Mistakes to Avoid
As a professional cycling coach and endurance coach, Coach Seacat has seen countless athletes struggle with fueling strategies that don’t match their needs. Over the years, he’s helped cyclists, runners, and endurance athletes fine-tune their nutrition plans to avoid the common pitfalls that can derail performance. No matter how strong or well-trained you are, poor fueling can leave you drained, sluggish, or even on the side of the road, completely bonked. Here are some of the most common mistakes he’s seen and how to avoid them:
- Not practicing your race-day nutrition. What works for one person might wreck another’s stomach.
- Test your fueling strategy in training.
- Overloading on fiber and fat before the race – They slow digestion and can lead to GI distress.
- Waiting too long to fuel during the event. Once you feel drained, it’s too late to recover quickly.
Through his experience, both racing and coaching, he has learned that fueling is personal. The right plan can keep your energy steady, prevent stomach issues, and help you perform at your peak. Don’t let simple mistakes hold you back!
Common Fueling Mistakes to Avoid
Fueling for endurance events isn’t just about eating, it’s about strategy. The right balance of carbs, hydration, and electrolytes can keep you performing at your best. Experiment in training, listen to your body, and come race day, you’ll have the confidence to push through the miles, fueled and ready.
After all, you wouldn’t drive a car on empty. Why would you race that way?
Coach Seacat has carved a space for himself as an expert coach in the discipline of cycling. With 15+ years of coaching and prestigious certifications from USA Cycling and the National Strength and Conditioning Association (NSCA), Coach Seacat brings a comprehensive approach to coaching that combines advanced training techniques with fundamental cycling strategies.
Garret also works as the Marketing Director for both Mathis Physical Therapy and Doctors of Physical Therapy.
