Why Electrolytes and WOD Fuel Are Essential for Marathon Training
Yesterday, on the streets of London, history was made. Kenyan runner Sabastian Sawe crossed the finish line of the 2026 TCS London Marathon in 1:59:30 the first person ever to break the two-hour barrier in an official marathon race. The world watched in disbelief. His coach said he had seen things in Sawe he thought were "almost impossible."
Beyond the genetic gifts and the thousands of training miles, elite marathon performance comes down to one thing most runners underestimate: what you put in your body before, during, and after every session. Fueling is not an afterthought. It is the strategy.
Whether you are chasing a sub-two-hour fantasy or simply want to finish your first 26.2 feeling strong rather than broken, two products need to be at the core of your marathon nutrition plan: Electrolyte RX and WOD Fuel.
Why Electrolytes Are Non-Negotiable for Marathon Training
Over the course of a marathon, the average runner loses between one and two and a half litres of sweat per hour. That sweat is not just water. It is loaded with essential minerals: sodium, potassium, magnesium, and calcium. These regulate everything from fluid balance to muscle contractions to nerve firing.
When those minerals are not replaced, the consequences come quickly:
- Muscle cramps that strike at mile 20 when you can least afford them
- Cognitive fog that wrecks your pacing judgement
- Hyponatraemia, dangerously low sodium, which can occur when runners drink too much plain water without replacing salt
- Premature fatigue that turns a manageable effort into a suffer fest
Sports science is clear on this: even a 2% drop in hydration can impair athletic performance by up to 20%. Hydrating with water alone will not protect you. You need electrolytes.
Electrolyte RX — Built for Hard Training
WOD Powders Electrolyte RX is formulated to replenish the full spectrum of minerals you lose through sweat — without any heavy, sugary feel. Fast-mixing, light, and available in refreshing flavours, it is designed for athletes who train hard and need proper hydration support, not a watered-down afterthought.
Electrolyte RX supports:
- Proper cellular hydration throughout long training runs
- Muscle function and contraction — key for maintaining form across 26.2 miles
- Prevention of cramps and fatigue in the later stages of a race
- Sustained performance from the first mile to the last
Mix it into 500ml of water and sip before, during, or after training. It is as simple as that — and the difference it makes is anything but simple.
Available as a full tub (£16.99), a 16-sachet pouch (£12.99), or a single sachet (£1.00) — perfect for race day testing without committing to a full tub.
The Glycogen Problem, Why Water and Electrolytes Are Not Enough
Here is a fact every marathon runner needs to understand: your body can store roughly 90 minutes of glycogen at marathon pace. After that, if you are not fueling consistently, you hit the wall. The dreaded point where your legs stop cooperating, your pace falls apart, and the race becomes pure damage limitation.
Electrolytes keep the engine cool. WOD Fuel is the fuel that keeps it running.
Sabastian Sawe reportedly ate two slices of bread with honey and tea on the morning of his world record run. Simple carbohydrates. Fast-absorbing. The principle scales perfectly to your marathon prep.
WOD Fuel: Your Intra-Workout Endurance Weapon
WOD Fuel (£22.99) is an intra-workout supplement built specifically for athletes who push hard for a long time. Every ingredient is dosed to do a real job. No filler, no fluff.
What is inside WOD Fuel and why it matters for marathon runners:
Cluster Dextrin (8,000mg per serving) : A branded, trademarked form of cyclic dextrin that digests rapidly due to its low osmolarity. This means fast, smooth energy delivery with no gastric distress, exactly what you need when you are 18 miles in and cannot afford stomach issues. Unlike cheaper carb sources such as maltodextrin and dextrose, cluster dextrin will not slow you down.
Citrulline Malate (900mg) : Raises nitric oxide levels in the blood, improving blood flow and helping delay the onset of muscle fatigue. More aerobic energy production (ATP) means you can sustain a stronger pace for longer.
BCAA 2:1:1 (1,600mg) : The building blocks of protein that support endurance and help protect muscle tissue during long efforts, reducing breakdown when glycogen runs low.
L-Glutamine (1,200mg) : Supports muscular recovery and helps replenish glycogen stores after intense sessions, getting you back out the door faster for your next training run.
Taurine (900mg) : Supports cellular hydration and blood flow, working in tandem with the electrolyte profile.
Full Electrolyte Blend: Sodium (150mg), Potassium (60mg), Calcium (37.5mg), and Magnesium (15mg) per serving. WOD Fuel is also actively replacing what you are sweating out while you train.
WOD Fuel is non-dairy, gluten-free, non-GMO, and suitable for vegans. Available in 11 flavours including Tropical, Strawberry and Kiwi, Peach, Cherry Limeade, Pineapple, Hawaiian Punch, Green Apple, Iron Brewed, and White Energy - 40 servings per 600g tub.
Directions: Mix one 15g scoop with 500ml of cold water. Sip throughout your workout or long run.
Your Marathon Nutrition Protocol — Week by Week
The biggest mistake marathon runners make is leaving their nutrition strategy until race week. Your gut adapts just like your legs do, it needs training too. Start practicing your fueling routine from the first long run of your training block.
During Training
Before long runs: Mix one serving of Electrolyte RX into 500ml of water and drink 30 to 45 minutes before heading out. This front-loads your hydration and gives your body the mineral base it needs before sweat losses begin.
During runs over 60 minutes: Start sipping WOD Fuel® at the 30-minute mark. Repeat every 30 to 40 minutes. This keeps blood glucose stable, spares glycogen, and prevents the wall from making an early appearance.
After every run: Replenish with Electrolyte RX alongside your post-run meal. This accelerates recovery and tops up depleted minerals ahead of your next session.
On Race Day
Use exactly what you have practiced in training. Nothing new on race day. Set a fueling alarm on your watch so fatigue does not cause you to miss a feed. Carry Electrolyte RX sachets for convenient top-ups between water stations.
The Sub-2 Lesson for Every Runner
Sabastian Sawe's 1:59:30 world record at the 2026 London Marathon did not just rewrite what we thought was possible. It reminded the entire running world that performance is a system. Talent, training, and fueling working together. You cannot shortcut any part of it.
You may not be chasing a sub-two. But whether you are targeting a 3:30, a 4:15, or simply want to cross the finish line on your own terms, the fundamentals are identical. Train smart, recover well, and fuel like your race depends on it.
Because it does.
Build Your Marathon Fuel Stack
| Product | Best For | Price | Link |
|---|---|---|---|
| Electrolyte RX Tub | Daily training hydration | £16.99 | Shop Now |
| Electrolyte RX Sachets (16pk) | Race day & on-the-go | £12.99 | Shop Now |
| Electrolyte RX Single Sachet | Try before you buy | £1.00 | Shop Now |
| WOD Fuel® (600g / 40 servings) | Intra-workout & long runs | £22.99 | Shop Now |
Spend over £40 and receive a FREE Mystery Sachet pack worth £5. Free UK delivery on all orders.
