Fueling properly during your half marathon or full marathon is one of the most important things you can do to maintain energy and maximize performance. Whether you’re a beginner or a more experienced runner, understanding how to use energy gels and other fueling strategies can make a huge difference on race day. In this post, I’ll share my thoughts on why proper fueling is crucial and offer some tips on how to use gels effectively in both half and full marathons.

Why Fueling is Important for Long-Distance Running

As you take on the challenge of a half or full marathon, your body taps into stored glycogen to fuel your muscles. However, those glycogen stores are limited. Once they run low, you risk hitting that dreaded “wall,” where fatigue and exhaustion take over. This is why fueling mid-race is so critical.

Using energy gels, chews, or sports drinks helps replenish your glycogen levels, giving your body the boost it needs to keep going strong. Proper fueling not only extends your endurance but also helps your muscles keep functioning efficiently so you can finish feeling strong.

When to Start Using Energy Gels in a Half Marathon

For a half marathon, you won’t need quite as much fuel as you would for a full marathon, but it’s still important to plan ahead. I recommend starting with your first energy gel around mile 5 to 6, depending on your pace and energy needs. A good rule of thumb is to take a gel every 45 to 60 minutes after the first hour of running.

Remember to wash it down with water, not a sports drink, to avoid overwhelming your stomach with too much sugar and electrolytes. Practice this during your training runs to see what works best for you. Everyone’s body responds differently, so training is the time to experiment!

Fueling Strategy for a Full Marathon

If you’re running a full marathon, you’ll need a more structured fueling plan to keep your energy levels steady. I suggest starting your fuel intake around mile 4 or 5, and then taking an energy gel every 30 to 45 minutes after that.

Here’s an example of what a good marathon fueling strategy might look like:

• Take your first gel around mile 4 or 5.
• Continue with a gel every 30 to 45 minutes (which translates to about every 4 to 6 miles, depending on your pace).
• Alternate your gels with hydration—either water or an electrolyte drink—at aid stations.

If gels aren’t your thing, you can also experiment with energy chews or bars. Just make sure to test these out during your training runs so you don’t have any surprises on race day!

How to Choose the Right Energy Gels

Choosing the right energy gel can be a little overwhelming because there are so many options out there. Look for gels that provide a balance of carbohydrates, sodium, and electrolytes. These will help sustain your energy and replenish the nutrients you lose while running. Popular brands I recommend are GU, Clif, and Honey Stinger, which offer a variety of flavors and formulations. I also really love Maurteen Gels for their performance on race day.

Here’s what you should consider when picking an energy gel:

• Carbohydrate content: Most gels contain 20-30 grams of carbs to help sustain your energy levels.
• Electrolytes: Make sure your gel contains sodium, potassium, or magnesium to replenish the electrolytes lost in sweat.
• Caffeine: Some gels have caffeine, which can give you a nice boost. Try them during training runs to see how your body responds.

Practice Makes Perfect

The best way to figure out your ideal fueling strategy is to practice. Incorporate gels into your long runs during your half marathon or marathon training to see how your body handles them. One key tip I give to all my runners is to use the same brands and flavors during training that you plan to use on race day. You don’t want to deal with an upset stomach because of a new product!

Final Tips for Marathon Fueling

• Don’t wait until you’re tired to start fueling. If your glycogen levels drop too low, it’s hard to bounce back.
• Stay hydrated: Always drink water with your gels to help with digestion and avoid stomach issues.
• Adjust for weather: Hotter temperatures may require more frequent fueling and hydration.
• Listen to your body: Everyone has different fueling needs, so pay attention to how your body feels during training runs and adjust your strategy accordingly.

By following these tips, you can avoid hitting the wall and finish your race strong. Fueling is just as important as the miles you put in, so be sure to practice and perfect your nutrition and hydration strategy before race day.

Fueling Success with Coach Misty

At Miles with Misty, I help runners like you prepare for your races with personalized training plans and expert advice. Whether you’re getting ready for your first half marathon or aiming for a PR in your full marathon, I’m here to guide you through every step—including your fueling strategy. Let’s make sure you’re fully prepared to take on race day!