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How to fuel for a 100 mile bike ride? Your definitive nutrition plan

5 min read

The body's glycogen stores can only power strenuous exercise for about 90-120 minutes before needing replenishment. Mastering how to fuel for a 100 mile bike ride is the most crucial factor for avoiding the dreaded "bonk" and finishing strong.

Quick Summary

Fueling a century ride requires a strategic nutrition plan encompassing proper carb-loading days before the event, consistent calorie and electrolyte intake during the ride, and focused recovery afterward.

Key Points

  • Strategic Carb-Loading: Increase complex carbohydrate intake to 8-10g/kg body weight in the 2-3 days before the ride to top off muscle glycogen stores.

  • Eat Early and Often: Start consuming carbohydrates within the first 30-45 minutes and continue every 15-30 minutes thereafter to prevent energy crashes.

  • Aim for 30-90g Carbs/Hour: Target a carbohydrate intake range based on intensity and body weight, using a mix of glucose and fructose for maximum absorption.

  • Prioritize Hydration and Electrolytes: Drink 500-1000ml of fluid per hour, and use electrolyte drinks or supplements on rides over 60 minutes or in hot conditions.

  • Recover Within the Golden Hour: Consume a carb-to-protein ratio of 3:1 within 60 minutes of finishing to aid muscle repair and replenish glycogen.

  • Practice Your Nutrition Strategy: Never try new foods or products on event day. Test your entire fueling plan during your training rides.

In This Article

The Pre-Ride Strategy: Carb-Loading and Breakfast

Proper preparation begins well before you clip into your pedals. What you eat and drink in the days leading up to your century ride is just as important as what you consume on the day itself.

The 2-3 Days Before: Strategic Carb-Loading

Carb-loading is the practice of increasing your carbohydrate intake to top off your muscle and liver glycogen stores, essentially maximizing your body's readily available fuel. Experts recommend consuming 8-10g of carbohydrates per kilogram of body weight per day in the 2-3 days preceding your event.

  • Prioritize complex carbs: Focus on foods like pasta, rice, potatoes, and oats. These provide a sustained energy release.
  • Reduce fiber, fat, and protein: While these are vital for everyday health, you should slightly decrease them during the carb-loading phase to make room for more carbohydrates and ease digestion on the day of the ride.
  • Stay hydrated: Adequate fluid intake is crucial for your body to process and store carbohydrates effectively.

The Evening Before

Your final pre-ride dinner should be a familiar, high-carbohydrate meal that is low in fat and fiber. A classic choice is spaghetti with a simple tomato-based sauce and lean protein. Avoid trying new foods that might cause stomach upset.

The Morning of the Ride

Eat your breakfast 2-3 hours before the start to allow for proper digestion. Again, stick to foods you've tested during training rides. Great options include a bowl of oatmeal with banana, eggs on toast, or a bagel with peanut butter. Aim for a light, high-carb meal to top off your glycogen stores after an overnight fast.

During the Ride: Fueling on the Go

One of the biggest mistakes a rider can make is waiting until they feel hungry or thirsty. By then, it's often too late. For a ride lasting several hours, a consistent fueling schedule is essential.

The First 30-45 Minutes

Start eating early, within the first 30 to 45 minutes of your ride. This helps maintain stable blood sugar levels and prevents your body from dipping into its stored energy too quickly. This is a good time to consume a more solid fuel source, like a bar or small sandwich.

The Rest of the Ride

After the first hour, aim to consume 30-90g of carbohydrates per hour, depending on your intensity and body weight. For higher-intensity efforts or for heavier riders, higher intake (up to 90g/hr) is beneficial. To achieve these higher rates, use a carbohydrate blend of glucose and fructose, which allows for better absorption.

Mixing it Up: Solid vs. Liquid Fuels

Using a mix of different fuel types can help prevent palate fatigue and stomach issues. A good strategy is to use slower-release solid foods in the first half of the ride and transition to faster-acting gels or chews in the latter half when digestion can become more challenging.

Hydration and Electrolytes: The Other Side of the Coin

Dehydration can cause fatigue and cramping, severely impacting performance. A proper hydration strategy involves staying hydrated in the days before the event, not just during.

  • Pre-Ride Hydration: Sip water and electrolyte drinks in the 24 hours leading up to the ride.
  • During the Ride: Drink little and often—aim for a few gulps every 10-15 minutes. This is more effective than guzzling a whole bottle at once. Target 500-1000ml of fluid per hour, depending on temperature and sweat rate.
  • Electrolyte Replacement: For rides over an hour or in hot weather, replenish lost sodium and potassium with an electrolyte-containing sports drink or chew.

Recovery: The Golden Hour

What you do immediately after your ride sets the stage for how quickly you recover and how you feel the next day. The "golden hour"—the first 60 minutes post-exercise—is when your body is most receptive to refueling.

  • The First 60 Minutes: Consume a snack with a 3:1 or 4:1 ratio of carbohydrates to protein. This combination quickly replenishes glycogen stores and aids muscle repair. Chocolate milk, a recovery shake, or a turkey sandwich are all great options.
  • The Rest of the Day: Eat a balanced, nutrient-dense meal a few hours later. Include lean protein, complex carbohydrates, and plenty of vegetables. Continue to rehydrate with water and electrolytes as needed.

Comparison of On-Bike Fueling Options

Fuel Source Carbohydrate Form Speed of Absorption Portability Best Use Case Considerations
Energy Bars Complex carbs (oats, fruit) Slower, sustained High First half of ride, low-intensity Requires chewing, potential for flavor fatigue
Energy Gels Simple sugars (glucose, fructose) Faster, quick boost High Second half of ride, high-intensity Can be sticky, often require water to digest
Energy Chews/Gummies Simple sugars Fast High Second half of ride, high-intensity Similar to gels but chewed, less risk of GI distress for some
Sports Drink Mix Simple sugars, electrolytes Fast, continuous Medium (depends on bottle access) Throughout the ride, especially in heat Hydrates and fuels simultaneously, can reduce solid food intake
Real Food (Banana, Rice Cake, PB&J) Mix of complex/simple carbs Variable Variable First half of ride, lower intensity Easier on stomach for some, can be messy or less portable

Common Nutrition Mistakes to Avoid

  • Waiting until you feel hungry or thirsty: By the time you notice these signals, you're already behind on your fueling. Set a timer on your bike computer to remind you to eat and drink every 15-30 minutes.
  • Eating too much at once: This can overwhelm your digestive system and cause stomach cramps or nausea. Stick to small, regular amounts.
  • Overeating or undereating carbs: The goal is to fuel adequately, not binge. Similarly, running on an empty tank will lead to poor performance and an intense crash.
  • Trying new foods on event day: Always test your nutrition strategy during training. What works for one person might cause GI issues for another.
  • Neglecting electrolytes: Water alone is not enough for long rides, especially in warm weather. Replenishing salts is crucial for preventing cramps and maintaining fluid balance.

Conclusion

Fueling a 100-mile bike ride successfully is a process of preparation, practice, and listening to your body. By strategically carb-loading in the days prior, maintaining a consistent intake of carbohydrates and fluids during the ride, and recovering promptly with a mix of carbs and protein, you can unlock your full potential and enjoy a strong, consistent performance. A well-executed nutrition plan is the foundation of any successful long-distance cycling endeavor. Epic Road Rides provides additional tips for endurance cycling.

Frequently Asked Questions

Carb-loading is the process of increasing your carbohydrate intake in the days leading up to an endurance event. It is important because it maximizes the glycogen stored in your muscles and liver, providing your body with a larger fuel reserve for the long ride.

Most cyclists should aim to consume between 30 and 90 grams of carbohydrates per hour. The amount depends on your body weight and the intensity of your effort. A higher intake of up to 90g/hr is possible by using a mix of glucose and fructose.

A mix of both is often recommended. Energy bars provide slower-release energy, suitable for the beginning of the ride, while faster-acting energy gels and chews are ideal for the second half when you need quicker fuel.

Drink little and often, taking 2-3 gulps from your bottle every 10-15 minutes. Don't wait until you feel thirsty, as this is a sign you're already dehydrated.

For rides over 60 minutes, high-intensity sessions, or in hot conditions, you should use an electrolyte drink or supplement to replace the salts lost through sweat. This helps prevent cramping and maintains fluid balance.

Within the first 60 minutes after your ride, consume a mix of carbohydrates and protein with a ratio of around 3:1 to 4:1. Good options include a recovery shake, chocolate milk, or a turkey sandwich to replenish glycogen and aid muscle repair.

No, you should never try new foods or energy products on event day. Always test your nutrition strategy during your training rides to ensure your stomach tolerates them well and you know what to expect.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.