Some performances don't just win the event, they redefine what's possible. At HYROX Warsaw, Joanna Wietrzyk completed the Grand Slam and became the first athlete in HYROX history to win all four Major titles. She also set a new World Record at 54:25.08.
This is what happens when preparation, fueling, and execution all converge at the right moment.
What It Takes to Make History
The Grand Slam isn't just about fitness. It's about arriving at each event ready to compete at the highest level — which means nutrition strategy isn't an afterthought, it's part of the race plan. Joanna broke down exactly how she fueled her record-setting performance at Warsaw.
Building the Foundation: Race Week Carb Loading
In the days leading up to the race, Joanna increases her carbohydrate intake to make sure her muscles are fully stocked with energy before the gun goes off. Her approach combines whole foods with targeted supplementation — not one or the other, but both working together to top off glycogen stores and arrive at the start line primed.
Staying Ahead of Dehydration
Hydration isn't something Joanna saves for race morning. She prioritizes it consistently throughout the week, with a particular focus on race day itself. Her go-to tool: Dr. Hydrate electrolytes before and after the race to support her system with the vitamins and minerals that keep performance dialed in under pressure.
The Mid-Race Edge: SiS Beta Fuel Gels
HYROX is relentless — and the second half is where races are won or lost. After the sled pull, Joanna reaches for a SiS Beta Fuel gel (strawberry & lime is her flavor of choice) to keep energy levels from dropping when it matters most. At 40g of carbohydrates per gel, it's enough to deliver a genuine second wind and stay competitive through the back half of the race.
The Standard Just Changed
Joanna Wietrzyk's run at Warsaw wasn't luck — it was the result of a complete performance system, fueling included. Four Majors. One record. And a blueprint for what it looks like when preparation meets ambition.
Want to fuel like a World Record holder? Shop Joanna's race-day picks at The Feed.
