7 Elite Performances, One Weekend — What the Race Nutrition Data Really Showed
7 Elite Performances, One Weekend — What the Race Nutrition Data Really Showed
One weekend. Seven races across road, trail, and ultra distance. Podium finishes, personal bests, and a Golden Ticket to Western States 100.
Behind every single one was a nutrition strategy built around individual physiology — tested, refined in training, and executed under pressure on race day. Precision Fuel and Hydration tracked the data for each athlete. Here is what the numbers showed and what you can take from it.
The Three Things That Stood Out Above Everything Else
Before the athlete breaks down, three principles ran through every performance without exception.
Know your numbers before race day. The athletes at the front of these fields did not guess at their carbohydrate intake, fluid targets, or sodium requirements. Those numbers were established in training, informed by sweat testing, and built into a plan that could be executed under fatigue. Carbohydrate per hour, fluid per hour, sodium per litre of sweat — these are not abstract figures. They are the foundation of a strategy that holds up across 10, 15, or 20 hours of racing.
Gut training is not optional. The ability to absorb 90 to 100 grams of carbohydrate per hour at race intensity does not happen by accident. It is a physiological adaptation that develops over weeks and months of deliberate practice in training. Athletes who try to hit high carbohydrate targets in a race without building that tolerance in advance pay for it. Those who train their gut consistently arrive at the start line with a genuine performance advantage.
Recovery fuelling is where most athletes leave performance on the table. What you consume in the hours after a hard effort directly affects what you can do next — in the following training session, the next race, or the following season. It is not an afterthought. It is part of the strategy.
The Seven Performances — By the Numbers
Rose Harvey — London Marathon, 2:26, 9th Overall, 2nd British Woman
Rose Harvey ran one of the finest British marathon performances of the year, finishing 9th overall at London in 2:26 and qualifying for major international selection.
Her fuelling strategy was built around consistency. She took on nutrition at every pro aid station throughout the race — alternating between gels and carbohydrate drink mix — with her sodium intake matched precisely to her individual sweat test result of 1,064mg of sodium per litre of sweat.
The cooler conditions at the start of the race shaped how she fuelled early on. With fluid intake naturally lower in colder temperatures, Rose leaned on gels to keep her carbohydrate numbers up — a strategy she had specifically practised in training. As the race warmed, she shifted toward more fluid-based carbohydrate sources.
The lesson: knowing how your fuelling format needs to adapt to changing conditions is not something you figure out mid-race. It is something you rehearse.
Louise Small — London Marathon, 2:28:29, 11th Female Pro
Louise Small ran 2:28:29 at London and produced some of the most impressive fuelling numbers of the entire weekend.
121 grams of carbohydrate per hour. 788ml of fluid per hour. A relative sodium concentration of 1,154mg per litre.
Her strategy involved picking up 250ml of carbohydrate and electrolyte drink mix every 5km, with additional gels at 5, 10, and 20km to hit her carbohydrate targets. At 30 and 35km, she added cola — both for variety and for the morale lift that something different can provide in the closing stages of a hard race.
In the weeks before London, Louise completed a two-week heat training block at the Precision Performance Lab. Heat training has been shown to drive physiological adaptations that improve performance across all conditions — not just warm ones. It was a smart piece of preparation that covered multiple bases regardless of what the weather on race day delivered.
At 121 grams of carbohydrate per hour, Louise was operating at the upper end of what current sports science recommends for elite marathon runners. Research consistently shows a dose-response relationship between carbohydrate intake and endurance performance — but only in athletes whose gut can reliably absorb those quantities without distress.
Sam Griffiths — London Marathon, 2:23:02, Six-Minute Personal Best
Sam Griffiths weighed 125kg when he took up running three years ago. At London, he ran 2:23:02 — a six-minute personal best — and crossed the line with data showing exactly why.
101 grams of carbohydrate per hour. 336ml of fluid per hour. A relative sodium concentration of 1,250mg per litre.
His race nutrition consisted of five gels taken at roughly 30-minute intervals, alongside two bottles of carbohydrate and electrolyte drink mix. Post-race, Sam reflected that leaning more heavily on drink-based carbohydrate would have helped him increase his fluid intake — useful data for building the next iteration of his strategy.
His story is a reminder that progress in endurance sport is rarely linear, and that nutrition strategy evolves alongside fitness. The athletes who improve fastest are those who treat every race as a data point.
Chris Myers — Mount Fuji 100 Mile, 1st Place, 17:50 on Course
Chris Myers topped the podium at the Mount Fuji 100 Mile in one of the standout ultra performances of the weekend.
Across 17 hours and 50 minutes of racing, he averaged 97 grams of carbohydrate per hour — the majority delivered through gels, alongside four litres of carbohydrate and electrolyte drink mix and 29 electrolyte capsules. His relative sodium concentration across the race was approximately 869mg per litre, closely matched to his individual sweat test result of 839mg of sodium per litre.
The precision of those numbers is not incidental. At the Mount Fuji 100, athletes face significant elevation, variable temperatures, and a race duration that tests the limits of what the gut can absorb and sustain. Hitting close to 100 grams of carbohydrate per hour across nearly 18 hours requires a level of gut adaptation that is built over months of deliberate training — not weeks.
Chris carried the majority of his nutrition in his race vest and running belt throughout, ensuring he was never dependent on aid station availability to hit his targets.
Rachel Drake — Madeira Island Ultra Trail 56km, 1st Place
Eight months after giving birth to her daughter Chloe, Rachel Drake returned to racing. She won.
Rachel used Flow Gel in a race for the first time at Madeira, incorporating it into her strategy specifically to keep her carbohydrate intake consistent across the full distance. She also added electrolyte capsules to her hydration plan, giving her the flexibility to top up her flasks with plain water from aid stations without compromising her sodium targets.
Her performance is a reminder that the underlying principles of race nutrition — carbohydrate consistency, sodium management, fluid control — apply regardless of where an athlete is in their career or life. The strategy adapts. The fundamentals do not.
Tyler Green — Madeira Island Ultra Trail 110km, 3rd Place
Tyler Green's Madeira 110km came with an additional challenge that most athletes never have to plan for: a midnight race start.
The opening miles of his race were run in the early hours of the morning, when alertness is naturally compromised and the temptation to under-fuel in the absence of daylight and warmth is real. Tyler addressed this directly — taking a caffeine gel 30 minutes before the gun went off to sharpen his focus for those critical opening hours.
From there, he managed his carbohydrate and sodium intake methodically across the full distance using a combination of high-carbohydrate gel and carbohydrate drink mix with electrolytes, adjusting his fluid intake as temperatures shifted through the day.
Caffeine is one of the most consistently evidenced performance supplements available to endurance athletes. Used strategically — rather than continuously — it provides a meaningful and reliable benefit, particularly during periods of fatigue or low arousal. Tyler's pre-race timing is a textbook application of that principle.
Hayden Hawks — The Canyons 100km, 3rd Place, Golden Ticket to Western States 100
Hayden Hawks has finished on the podium in nine of his last ten races. Third at The Canyons 100km adds another, and more importantly, secures his Golden Ticket for Western States 100.
Across 8 hours and 23 minutes of racing, Hayden used a combination of 90g and 30g gels as his primary carbohydrate source, alongside electrolyte capsules calibrated to replace a meaningful proportion of the 901mg of sodium he loses per litre of sweat.
That sodium figure — established through sweat testing — sits above the average of approximately 950mg per litre seen across large populations of endurance athletes. For an athlete racing in the heat of the California mountains, getting that number right is not a marginal gain. It is a direct performance variable.
What This Means for Your Racing
These seven athletes compete at the front of their respective fields. But the principles behind their strategies apply at every level of endurance sport.
You do not need to be running for a Golden Ticket to benefit from knowing your sweat sodium concentration. You do not need to be targeting a 2:23 marathon to improve your carbohydrate per hour. And you do not need to race ultras to understand that gut training is a process, not a shortcut.
What you need is a plan built around your physiology, practised in training, and executed with consistency on race day.
Whether you are preparing for your first half-distance triathlon, a trail 50km, or building base fitness for next season, the framework is the same. Know your numbers. Train your gut. Recover properly.
The rest follows.
Build Your Own Strategy
Every athlete featured in this piece works with Precision Fuel and Hydration to build nutrition strategies grounded in individual data. Sweat testing, fuelling planners, and race-specific guidance are available to athletes at every level — not just the professionals.
Start Building Your Training and Race Nutrition Plan Here - https://fuelapp-endurancekollectivecom.base44.app