Overwhelmed by running nutrition? A simple no-BS guide for runners

You've Googled "what should runners eat." You've read about carb loading, gut training, periodized nutrition, fasted runs, glycogen depletion, and seventeen different gel brands. And somehow you feel less confident than when you started.

Here is the truth: most running nutrition advice is designed for the 1% — elite athletes optimizing for marginal gains. For the other 99% of runners, getting the basics right is enough to transform how you feel on every run.

This guide strips running nutrition down to three rules. Follow these and you'll outrun 90% of people who are overthinking it.

Rule 1: eat before you run (2–3 hours ahead)

Running on empty is like driving with the fuel light on. You might make it, but you'll feel terrible and perform worse. A pre-run meal tops up your glycogen stores and gives your muscles ready energy.

• Eat 1–2g of carbs per kg of body weight, 2–3 hours before your run.
• Keep it familiar — this is not the time to try new foods.
• Lower fat and fiber so your stomach can process it quickly.

For a 70kg runner, that's 70–140g of carbs. Real examples:

• Bowl of oatmeal + banana + honey (about 75g carbs)
• Bagel + jam + glass of juice (about 80g carbs)
• Rice + egg whites + fruit (about 70g carbs)

If you can't eat 2 hours before (early morning runners), a banana or half a gel 15 minutes before is enough for runs under an hour.

To take the thinking out of it, settle on two go-to pre-run meals. One full option for when you have 2–3 hours, like a bagel with honey, a banana and yogurt. One quick option for when you are rushed, like a banana, applesauce or toast with jam 30–60 minutes before. Practice both in training so race morning is never a guess.

Rule 2: fuel during runs over 60–90 minutes

Your body stores roughly enough glycogen for 90 minutes of running. Once it runs low, you bonk — that sudden, crushing fatigue where your legs feel like concrete and your brain goes foggy.

For runs under 60 minutes, you do not need to eat during the run. Water is fine. For anything longer, take in carbs while you run:

The simplest approach: carry one gel per 30–40 minutes of running past the first hour. Wash each gel down with water. That's it.

Rule 3: eat after you run (within 2 hours)

Post-run nutrition is about recovery — refilling the energy you spent and giving your muscles what they need to rebuild. You have about a 2-hour window to eat, and the sooner the better.

• Carbs: 1–1.2g per kg to replenish glycogen
• Protein: 20–30g to support muscle repair
• Fluid: drink until your urine is pale yellow
• Sodium: add salt to your food if you sweated heavily

A normal meal covers this. Rice and chicken, pasta with meat sauce, eggs on toast with a side of fruit — you don't need a specialized recovery product.

Match the food to the run

The three rules get simpler once you stop treating every run the same. A 30-minute recovery jog does not need the same plan as intervals after a long workday. Match the food decision to the session:

• Easy run under 60 minutes: your normal meals are usually enough.
• Morning run before breakfast: a small carb top-up helps if the effort is moderate or hard.
• Intervals or a workout: arrive with carbs on board. This is not the day to skip Rule 1.
• Long run over 90 minutes: practice fueling during the run with Rule 2.
• Race rehearsal: practice the exact race-day breakfast and fuel timing.

The same idea applies across the week. Eat more on your big training days, and do not let busy or light days slide into accidental underfueling.

What you can ignore

A lot of nutrition advice sounds important but doesn't move the needle for most runners. Here is what you do not need to worry about:

• Exact macro ratios — being roughly right is fine. Prioritize carbs, get some protein, and don't fear fat.
• Fasted running debates — it does not magically burn more fat or improve performance. Fuel your runs.
• The 30-minute protein window — you have about 2 hours. Relax.
• Supplements — creatine, beta-alanine, and beetroot powder are nice-to-haves, not need-to-haves.
• Tracking every calorie — focus on timing and food quality first. Tracking matters most when you're dialing in race performance.
• Shiny new gels, bars or drink mixes, especially in race week. Stick with products you have already tested in training.
• One bad run. It is not proof that your whole plan is broken.

Your 3-rule checklist

• Before: Eat a carb-focused meal 2–3 hours before, or a banana 15 minutes before.
• During: Take gels or sports drink on runs over 60–90 minutes.
• After: Eat a normal meal with carbs and protein within 2 hours.

That's it. Three rules. Follow them consistently and you'll feel the difference within a week.

Start small, then build

If running nutrition feels overwhelming, the cure is not more information — it is doing less, consistently. Pick just the first rule and live with it for a week before adding the next. Most runners who feel buried in conflicting advice are trying to optimize everything at once; in reality, simply eating more around your hard days and not under-fueling long runs solves the bulk of the problem. Master that, and the finer points of timing and products become easy refinements rather than another source of anxiety.

Automating these rules — adjusting carbs by training load and timing meals to your schedule so you never do the math — is what Mavr is for, and it genuinely lowers the mental load. But the three rules themselves are the substance, and adopting them one at a time is something any runner can do for free.

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