Summary of the Podcast Episode: Avoid These 5 Carb Loading Mistakes
In this episode of the Holley Fueled Nutrition Podcast, host Holley Samuel, a sports dietitian specializing in runners, discusses common pitfalls in carb loading strategies for marathons and long-distance events. Drawing from her expertise and research, she emphasizes that effective carb loading involves increasing carbohydrate intake to maximize glycogen stores in muscles and the liver, which helps prevent “hitting the wall” during races. The focus is on preparing the body without causing gastrointestinal (GI) distress or other issues, and she stresses the importance of practicing these strategies during training to ensure they work on race day. The five mistakes are detailed below, with explanations on why they occur and how to avoid them.
Mistake 1: Not Practicing Carb Loading in Training
Carb loading shouldn’t feel like a massive overhaul; it should be a slight increase from your usual intake. If the target amounts feel overwhelming, it may indicate chronic underfueling during regular training. To avoid this, incorporate practice sessions before long training runs to build tolerance and optimize performance.
Mistake 2: Reaching for Fatty Foods During Carb Loading
High-fat foods can hinder digestion and make it hard to hit carb goals due to increased fullness and potential GI problems. Instead, prioritize low-fat, high-carb options to ensure efficient glycogen storage without discomfort.
Mistake 3: Incorrect Fiber Intake (Too Much or Too Little)
Fiber management is crucial for a low-residue diet that promotes quick glycogen replenishment and higher blood sugar levels for better performance. Excessive fiber can lead to GI upset, while too little might cause constipation. The key is finding a personal balance through practice, especially for those with conditions like diabetes.
Mistake 4: Not Staying Hydrated Enough
Glycogen storage naturally pulls in water, which can lead to dehydration if fluid intake isn’t adjusted. Proper hydration supports the process and prevents issues on race day.
Mistake 5: Panicking Over Feeling Fluffy or Not Looking Skinny/Fit
Temporary water retention from glycogen is normal and beneficial for energy reserves. Stressing over appearance or weight can undermine the benefits; focus on the performance gains instead.
Key Points Regarding Formulas or Amounts
- Carb Loading Targets: Aim for 8-12 grams of carbs per kilogram of body weight per day, typically for 2-3 days before a marathon or 1-2 days before a half marathon. For practice, try a one-day carb load before long runs lasting over 2 hours.
- Fiber Recommendations: Keep intake below daily guidelines during carb loading—under 25g for women and under 38g for men—to minimize GI issues. Limit vegetables to about one serving per day, and opt for low-fiber swaps like white rice or juice instead of whole grains or fruits.
- Hydration Adjustment: Increase water intake by an extra 20-30 ounces per day to account for water retention associated with glycogen storage.
- Expected Weight Fluctuation: Anticipate a temporary gain of a few pounds from glycogen and water, which is normal and supports avoiding energy crashes (e.g., at mile 22 in a marathon).
Links from the Show Notes
- Free Carb Loading Guide: https://mailchi.mp/976d7c6339e5/et2m72gssz
- Build Your Race Week Fuel Plan Masterclass: https://holleyfuelednutrition.thinkific.com/courses/race-day-fuel-plan