You've got your place. You know the date — Sunday 13 September 2026, Newcastle to South Shields, 13.1 miles. Now comes the part that most runners underprepare: what you're putting in your body between now and the finish line.
This isn't a generic half marathon nutrition guide. It's written specifically for the Great North Run — the course, the conditions, the kind of runner who lines up at the start on the A167 — and it covers everything from how to fuel your long training runs through to what to do the night before the race.
Why nutrition matters more than most GNR runners think
The Great North Run has a deceptive course profile. The first few miles feel manageable — you cross the Tyne Bridge on the adrenaline of 60,000 people around you, and the early miles through Gateshead feel fast. Then miles three to five hit you with a steady incline. By mile eight you're on the A194 and the legs are starting to talk. The final stretch along the seafront into South Shields sounds picturesque. In reality, it's where most first-timers hit the wall.
That wall isn't just fitness. It's glycogen depletion, electrolyte loss, and magnesium running low. The runners who manage it well aren't fitter — they've just fuelled smarter in the weeks before the race and on the day itself.
Training nutrition: the months before September
Most runners focus their nutrition thinking on race week. That's too late. The adaptations that make you a better half marathon runner happen during training, and those adaptations require consistent nutritional support.
The long run is where it starts
Your weekly long run is the cornerstone of GNR preparation. It's also where most runners make their biggest fuelling mistake: going out on empty to "train the body to burn fat," then wondering why they feel terrible and take four days to recover.
For runs over 60 minutes, your body needs carbohydrate support. That doesn't mean carb-loading before every 10-miler — it means not actively sabotaging your energy availability for the runs that are doing the most training work.
A practical approach: a light, carbohydrate-containing meal or snack 90 minutes before any run over an hour. Porridge, a banana, a slice of toast with peanut butter. Nothing complicated. Then take a gel or chews at the 45-minute mark if you're going beyond 90 minutes total.
Magnesium: the recovery nutrient most runners are missing
Here's a number worth knowing: around 70–80% of UK adults are deficient in magnesium. For runners, that number is likely higher — because magnesium is lost through sweat, and higher training loads accelerate that loss.
Why does this matter for GNR prep? Magnesium plays a direct role in muscle function, sleep quality, and the speed at which your legs recover between sessions. If you're waking up with cramping calves, struggling to sleep after hard efforts, or finding that your legs feel flat for days after a long run — low magnesium is a plausible reason.
The fix is simple. A daily magnesium supplement — specifically magnesium bisglycinate, which absorbs better than the cheaper oxide form you'll find in most supermarket options — taken in the evening supports recovery overnight and keeps your sleep quality consistent through a heavy training block.
Ready by Run Complete is magnesium bisglycinate formulated specifically for runners: two capsules taken before bed, £27.99 a month on subscription. If your GNR training is ramping up now, this is the one supplement worth adding before race day.
The two weeks before race day
The taper is mentally hard. Your mileage drops, your legs feel oddly heavy, and you start convincing yourself you're losing fitness. You're not — your body is consolidating the adaptations from the past few months of training.
What changes nutritionally in taper:
- Keep your protein intake consistent. Your muscles are still repairing and reinforcing. This isn't the time to drop calories just because you're running less.
- Don't make dramatic dietary changes. If pasta has been working for you, keep eating pasta. The week before a race is not the time to try a low-carb approach or cut out food groups.
- Hydration becomes more important. As your mileage reduces, it's easy to drink less because you feel like you need less. Start thinking about your hydration habits now rather than on race morning.
- Continue your magnesium supplementation. Sleep quality during taper week is critical. Runners who sleep poorly in the final few nights before a race consistently underperform compared to their training. Your magnesium routine supports that sleep.
Race week: the three days before
Thursday and Friday
Start increasing your carbohydrate intake slightly — not dramatically, just shifting the balance of your meals to be a little more carb-heavy than usual. Rice, pasta, bread, potatoes. This is topping up glycogen stores, not eating until you're uncomfortable.
Keep your protein and fats broadly the same. Avoid anything new, rich, or likely to cause digestive issues. This sounds obvious, but the Saturday before a big race is when people decide to try a new restaurant, eat something unfamiliar, and spend race morning regretting it.
Saturday (the day before)
The Great North Run starts in Newcastle city centre on Sunday morning. If you're travelling up from elsewhere, Saturday is a logistical day — registration, bag drop checks, finding your hotel, walking more than you planned.
Eat your main carbohydrate meal at lunch rather than dinner. A heavy pasta dinner the night before a race sounds like the right call, but a big meal late in the evening means your digestion is still working when you're trying to sleep. Mid-afternoon is better.
Dinner on Saturday should be simple, familiar, and not too large. Something you've eaten before and know agrees with you. Early evening, so you've got time to digest before sleep.
Take your magnesium before bed. A good night's sleep before a big race is worth more than any last-minute nutrition tweak.
Race morning
The GNR starts in waves, with the elite race first and mass runners starting from around 10:30am onwards depending on your wave. That means most runners have a reasonable amount of time on race morning, which works in your favour nutritionally.
Breakfast: 2.5–3 hours before your wave
Aim for something you've eaten before long training runs — your race morning is not the time to experiment. A practical breakfast: porridge with a banana, or toast with peanut butter and a glass of juice. Roughly 60–80g of carbohydrate, moderate protein, low fat and fibre to reduce the chance of GI issues mid-race.
Eat slowly. Don't rush it. You have time.
The hour before your wave
Sip water consistently rather than drinking large amounts at once. If you've been using electrolyte tablets or sachets in training, take one with 500ml of water in this window. Don't do anything new.
If you use caffeine, a coffee or caffeine gel 45–60 minutes before your start can improve performance and reduce perceived effort — but only if you've used caffeine before running in training. Race day is not the time to find out how your stomach handles it.
On the course: fuelling during the race
The GNR provides water stations and Lucozade Sport on the course. Water stations appear from mile 3. Lucozade stations are placed at miles 5, 8, and 11.
A practical fuelling plan for most runners:
- Miles 1–3: Settle into your pace. Don't take anything yet. Focus on not going out too fast — the early excitement and crowd energy makes this harder than it sounds.
- Mile 5: Take a gel if you're carrying them, or drink the Lucozade Sport at the station. Don't skip this. Even if you feel fine, your glycogen is being used and you want to stay ahead of depletion rather than catch up to it.
- Mile 8: Another gel or another Lucozade. You're at the Tyne Tunnel turn-off. The legs are working hard now. This is exactly when runners who didn't fuel at mile 5 start to struggle.
- Mile 10–11: Final fuel if needed. The North Sea is ahead of you. Two miles left. Stay composed.
The hill between miles 3 and 5
Worth flagging specifically: there's a steady incline between miles 3 and 5 that catches people off guard on race day. Train on hills if you can. And know that if your legs feel heavy on that section, it's the course, not a sign that something is wrong. The downhill between miles 5 and 8 is the reward.
After the finish line
You've crossed the line at South Shields. The recovery starts immediately.
In the first 30–60 minutes, prioritise carbohydrate to replenish glycogen and protein to begin muscle repair. The race provides some post-finish refreshments, but if you're serious about recovery — especially if you're running another event later in the year — bring your own: a recovery shake, a bar with both carbs and protein, or a banana and some yoghurt.
That evening: eat a proper meal, keep hydrating, and take your magnesium before bed. Your legs will thank you in the morning.
A note on supplements for GNR training
The supplement market for runners is noisy. Most of it isn't necessary. What actually makes a consistent difference across a 12–16 week half marathon training block:
- Magnesium bisglycinate: Daily. Supports recovery, muscle function, and sleep. Non-negotiable if you're training hard and want to absorb the work you're putting in.
- Electrolytes: For long runs over 75 minutes in warm weather. Not needed for every session.
- Protein: From food first. Supplements if you consistently can't hit your intake from meals.
That's genuinely it. Everything else is either marginal or marketed to people who want a shortcut that doesn't exist.
If you want to start with one thing before the Great North Run, start with magnesium. Ready by Run Complete is £27.99 a month — less than a post-run coffee every other day — and it's the supplement we built Run Complete around because it's the one that made the biggest difference in our own training.
Quick reference: GNR nutrition timeline
- Now until late August: Daily magnesium, consistent long-run fuelling, protein from food
- Two weeks out: Taper begins, maintain protein, prioritise sleep and hydration
- Thursday–Friday: Slightly increase carbohydrate intake
- Saturday: Carb-heavy lunch, light familiar dinner, magnesium before bed, early night
- Sunday morning: Breakfast 2.5–3 hours before your wave, sip water in the hour before
- On course: Fuel at mile 5, 8, and 10–11
- After finish: Carbs + protein within 60 minutes, magnesium that evening
Good luck on 13 September. The North East crowds are genuinely something — there's nothing quite like the Tyne Bridge at the start of the Great North Run.