NYC Marathon Gut Bombs: Why Gels Fail You at Mile 20
By Franklin Everett ShawThe wall. Every marathoner dreads it, but for NYC Marathon runners, it often hits with the force of a rogue yellow cab around mile 20. It’s not just mental fatigue; it’s a physiological crisis, often exacerbated by poorly chosen fueling strategies. Let’s dissect why those sugary energy gels, seemingly designed for endurance, so frequently betray runners on the streets of New York.
The problem isn’t necessarily the gels themselves, but how they’re used, and the specific demands of the NYC course. The constant undulation, the stop-and-go nature of navigating crowds, and the often-unpredictable New York weather all conspire to disrupt digestion and fuel absorption.
Traditional energy gels are primarily composed of simple sugars, like glucose and fructose. These sugars provide a quick energy boost, but they also require water for absorption. If you’re not adequately hydrated, your body will pull water from elsewhere, potentially leading to dehydration and gastrointestinal distress.
The NYC Marathon course, with its numerous bridges and varying terrain, makes consistent hydration a challenge. The Verrazano-Narrows Bridge, the first major climb, often leads to early overexertion and dehydration. This sets the stage for digestive issues later in the race.
Furthermore, the crowds in NYC can force runners to surge and slow down, disrupting their breathing and blood flow to the gut. This compromised blood flow hinders digestion and can lead to nausea, cramping, and the dreaded “runner’s trots.”
Many runners also make the mistake of relying solely on gels for fuel. This overload of simple sugars can overwhelm the gut’s capacity to absorb them, leading to osmotic diarrhea. The high concentration of sugar in the gut draws water in, resulting in loose stools and further dehydration.
So, what’s the solution? It’s a multi-pronged approach that focuses on personalized fueling, gut-friendly alternatives, and pre-race gut training.
First, ditch the one-size-fits-all fueling plan. Every runner is different, and their carbohydrate needs vary based on their weight, pace, and sweat rate. A good starting point is to aim for 30-60 grams of carbohydrates per hour, but this needs to be adjusted based on individual needs.
Consider alternative fuel sources that are easier on the gut. Instead of relying solely on gels, experiment with real food options like:
- Mashed sweet potatoes: A good source of complex carbohydrates and electrolytes.
- Rice cakes with nut butter: Provides a mix of carbohydrates, fats, and protein.
- Homemade energy bites: Combine oats, nuts, seeds, and dried fruit for a sustained energy release.
These options are often lower in simple sugars and contain fiber, which can help regulate digestion.
For runners who prefer gels, look for brands that contain a mix of glucose and fructose, or even better, glucose and maltodextrin. Maltodextrin is a complex carbohydrate that is broken down more slowly, providing a more sustained energy release and reducing the risk of digestive distress.
Several running stores in the NYC area offer a wide selection of gut-friendly fueling options. JackRabbit Sports, with multiple locations throughout the city, carries a variety of gels, chews, and real food options. They also offer personalized fueling consultations to help runners develop a plan that works for them.
Paragon Sports in Union Square is another excellent resource. They have a knowledgeable staff who can provide recommendations based on your individual needs and preferences.
A crucial, often overlooked aspect is pre-race gut training. Just like you train your muscles for the marathon, you need to train your gut to handle the demands of endurance exercise.
Start by gradually increasing your carbohydrate intake during training runs. This will help your gut adapt to processing larger amounts of fuel.
Experiment with different fueling strategies and products to see what works best for you. Don’t wait until race day to try something new.
Practice your fueling plan during long runs, simulating the conditions of the NYC Marathon as closely as possible. This includes running on hilly terrain, dealing with crowds, and practicing your hydration strategy.
Consider incorporating probiotics into your diet. Probiotics can help improve gut health and reduce the risk of digestive issues. Look for a probiotic supplement that contains a variety of strains, including Lactobacillus and Bifidobacterium.
Avoid high-fat and high-fiber foods in the days leading up to the race. These foods can be difficult to digest and may increase the risk of gastrointestinal distress.
On race day, stick to your fueling plan and don’t deviate from what you’ve practiced in training.
A common mistake is to over-fuel in the early miles of the race. This can lead to a build-up of undigested carbohydrates in the gut, increasing the risk of digestive issues later on.
Another pitfall is to neglect hydration. Dehydration can exacerbate digestive problems and impair performance. Make sure to drink regularly throughout the race, even if you don’t feel thirsty.
Remember, the NYC Marathon is a challenging race, and proper fueling is essential for success. By personalizing your fueling strategy, choosing gut-friendly alternatives, and training your gut beforehand, you can avoid the dreaded wall and cross the finish line strong. Don’t let mile 20 be your downfall; prepare your gut for the ultimate New York challenge.