Backyard Ultra Nutrition: What to Eat Between Loops

A backyard ultra gives you a possible eating window after every loop, but its duration is open-ended and the available rest time changes with your loop pace. The useful goal is not to obey a perfect spreadsheet. It is to keep taking in familiar food and fluid without creating a new problem through forced eating, overdrinking, or stimulant stacking.

Use the Hourly Window

Most runners use part of the time between loops to eat, refill, and check how they are responding. A simple routine reduces decisions:

1. On arrival, tell crew how your stomach, thirst, and alertness feel.
2. Choose one small, familiar food or drink rather than a crowded plate.
3. Prepare the next bottle or food option without automatically finishing it.
4. Leave enough time to stand, use the toilet, and reach the start safely.

Faster runners may eat mostly at base. Slower loops may require small amounts on course. Neither approach is inherently better; practice the version that fits your pace and event rules.

Build an Individual Fueling Range

Research offers reference ranges, not a backyard-specific formula. The International Society of Sports Nutrition position stand for single-stage ultramarathons proposes a broad racing range of 150–400 kcal per hour, including roughly 30–50 g of carbohydrate per hour. The paper also stresses palatability, tolerance, and individualization.

Start with what you have tolerated during long training sessions. If intake is consistently comfortable, you can test modest changes in one variable at a time. More is not automatically better: forcing a high number can worsen fullness, nausea, or diarrhea, while chronically low intake can leave you under-fueled.

• Use easy-to-count portions so crew can record what was offered and consumed.
• Include more than one texture and flavor to reduce taste fatigue.
• Distinguish a missed snack from a pattern of worsening intake.
• Review repeated GI trouble with a qualified sports dietitian.

Change Foods, Not Rules

Appetite and food preference may change across a long event, but there is no universal point at which every runner must switch from solids to liquids. Pack flexible groups rather than rigid race phases:

• Simple solids: sandwiches, rice, potatoes, bananas, or bars you have tested.
• Soft foods: porridge, rice pudding, soup, mashed potato, or yogurt if tolerated.
• Portable carbohydrates: sports drink, gels, chews, or fruit pouches.
• Savory options: broth, noodles, crackers, or familiar salted foods.

Warm food may be comforting overnight; cold options can be easier in heat. Food safety still matters: keep perishable items chilled, use clean utensils, and discard food that has sat outside safe storage.

Where Protein Fits

The same position stand includes small amounts of protein within its broad ultra-race framework, but that is not proof that a particular hourly dose prevents muscle damage in every runner. Protein-containing foods can add variety and make a plan more satisfying if they sit well. Examples include yogurt, milk drinks, nut butter, tofu, eggs, or small sandwich portions.

Do not let a protein target crowd out tolerable carbohydrate or fluid. Daily training and recovery needs are better planned across the whole diet with a sports dietitian than improvised during a race.

Use Caffeine Deliberately

Caffeine can improve aspects of exercise performance and alertness, but responses and side effects vary widely. A label-based plan is safer than assigning a fixed dose to a particular loop:

• Know how much caffeine is in every coffee, gel, drink, tablet, and medication.
• Use only products and amounts that you have already tolerated.
• Avoid stacking products because the first dose does not feel immediate.
• Reduce or stop if you develop palpitations, marked anxiety, tremor, or worsening nausea.
• Discuss caffeine with a clinician if you have a relevant heart condition, take interacting medicine, or are pregnant.

Hydrate Without Overdrinking

Exercise-associated hyponatremia (EAH) is usually driven by drinking more hypotonic fluid than the body can clear. The international consensus identifies drinking according to thirst as the practical prevention approach for most athletes. Weather and sweat rate matter, but a rigid hourly quota can be dangerous when it exceeds need.

• Respond to thirst rather than drinking automatically at every stop.
• Use familiar foods and drinks; do not chase body weight with forced fluid replacement.
• Sodium-containing food or drink may help replace some losses, but sodium cannot prevent EAH when someone overdrinks.
• Do not self-treat swelling, headache, nausea, or confusion by taking more salt.

Severe headache, repeated vomiting, confusion, unusual behavior, seizure, breathing difficulty, or declining consciousness requires urgent event-medical assessment. See the hydration and sodium guide for the full safety framework.

Practice the Plan

The gut can adapt to repeated nutrition practice, but studies do not establish one required timeline for every runner. Begin early enough to make gradual changes without turning every long run into a test.

• Practice the event foods and drinks during suitable longer sessions.
• Change one element at a time so you can identify what caused a problem.
• Test warm, cold, sweet, savory, solid, and liquid fallback options.
• Include a short backyard-format rehearsal to test the stop–start routine.
• Do not begin a restrictive low-FODMAP plan without qualified guidance.

Set Up a Simple Base

• Label food clearly: include ingredients, caffeine, and allergens.
• Pre-portion options: small servings are easier to accept and record.
• Separate caffeine: keep caffeinated and non-caffeinated products visually distinct.
• Protect food: use coolers, covered containers, clean hands, and clean utensils.
• Keep a neutral log: record intake, urine, symptoms, and decisions without forcing the planned amount.

Illustrative Loop Menus

These combinations show how to create options, not what every runner should consume in one hour:

• Cool daytime: part of a sandwich, banana, and a familiar drink taken to thirst.
• Hot conditions: a tolerated carbohydrate food plus cool fluid, with the amount guided by thirst and the event plan.
• Overnight: soup or rice with a non-caffeinated drink; add known caffeine only if it has a planned role.
• Low appetite: small sips and bites from two familiar fallback options, then reassess.

A crew log should distinguish what was offered from what was actually consumed. Trends in symptoms and alertness matter more than making the spreadsheet look complete.

GI Trouble and Red Flags

Nausea and other GI symptoms are common in endurance events, but their cause cannot be diagnosed from symptoms alone. Slow or stop, move to a safe place, and ask the event medical team for help if symptoms are persistent, severe, or accompanied by other warning signs.

• Try a slower pace and small amounts of one familiar option if symptoms are mild.
• Do not force food or fluid after repeated vomiting.
• Do not assume cola, salt, or an anti-nausea drug fixes the underlying problem.
• Seek prompt assessment for blood in vomit or stool, severe abdominal pain, chest pain, breathing difficulty, collapse, confusion, loss of coordination, or inability to keep fluid down.