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Race Nutrition Science

Practical guides grounded in sports science. No fluff, no filler — just the numbers and strategies you need on race day.

·9 min read

Caffeine Timing for Endurance Races: When and How Much to Take

Exact caffeine timing and mg/kg targets for marathons, 70.3s, and ultras, plus how to use coffee, gels, and gum without wrecking your gut or sleep on race day.

·8 min read

Why You Keep Getting Stomach Problems During Races (And How to Fix It)

Stomach issues during races usually come from pacing, heat, drink concentration, or poor gut training. Here's how to spot the cause and fix it properly.

·9 min read

How Much Sodium Do You Need Per Hour During an Endurance Race?

Most endurance athletes don't need random salt tabs. Here's how to estimate sodium per hour from sweat rate, weather, and race duration without overdoing it.

·12 min read

What to Eat the Morning Before a Race: A Pre-Race Breakfast Guide

Your liver glycogen drops 40% overnight. Here's exactly what to eat before a race, when to eat it, and what to skip so you don't blow up before mile 10.

·8 min read

How to Adjust Your Race Nutrition Plan for Hot Weather

Heat changes your sweat rate, gut function, and sodium needs. Here's exactly how to adjust your carbs, fluids, and sodium when race day turns hot and humid.

·9 min read

Gut Training for Endurance Athletes: How to Train Your Stomach Before Race Day

Your gut adapts to processing fuel at effort, but only if you practice. Here's the science behind gut training and an 8-week protocol to get race-ready.

·7 min read

Do You Need to Fuel During a Half Marathon? A Science-Based Answer

Whether you need gels during a half marathon depends on finish time. Here's how to figure out where you fall, what to carry, and when to take it today.

·9 min read

How Many Carbs Per Hour During an Ironman?

Exact Ironman carb targets by experience level, the glucose+fructose science behind 90-120g/hr, and a gut training plan that holds up on race day well.

·10 min read

Marathon Race Day Nutrition: A Complete Guide

Everything you need to fuel a marathon: carb loading, gel timing, fluid targets, sodium math, and what to do when it's hot. No fluff, just a practical plan.

·10 min read

How to Calculate Your Sweat Rate for Race Day

A step-by-step sweat test you can do at home, plus how temperature, humidity, and intensity change everything. Know your numbers before the starting line.