If you’ve ever watched athletes prepare for a HYROX race, you’ve probably noticed something strange. The sled pushes get filmed. The wall balls get drilled. The burpee broad jumps get obsessed over. But the running — the thing that actually determines your finish time — barely gets a second thought. If you’re serious about hyrox running training, it’s time to flip that script.
The Science Says Running Wins Races
A 2025 study by Brandt and colleagues put numbers behind what coaches have suspected for years: 59.2% of total HYROX race time is spent running. Not on stations. Not in transitions. Running.
The data gets more compelling. VO2max — a measure of aerobic capacity — was the single strongest predictor of HYROX race performance, showing a correlation of ρ = −0.71. That means athletes with higher aerobic fitness posted significantly faster overall times, not just faster running splits. Higher VO2max also improved station performance, likely because a stronger aerobic engine speeds recovery between efforts and sustains power output under fatigue.
When the researchers broke down what explained the most variance in finish times, running splits outweighed every individual station. In short: your 1 km segments between stations are where races are won or lost.
Why Athletes Still Undertrain Running
The problem is psychological. Stations feel harder because they’re unfamiliar and technique-dependent. Sled pushes burn. Farmers carries grip-test you. Rowing spikes your heart rate in a way that feels uniquely brutal.
Running, by contrast, feels like something you already know how to do — so it gets treated as recovery between the “real” work. Many athletes slot in a couple of easy jogs per week and call it done. That’s a mistake backed by the data above: ignoring 59% of your race is not a winning strategy.
How to Fix Your HYROX Running Training
Here are four evidence-based shifts that align your training with what the science actually shows.
- Dedicate Specific Running Sessions
Stop treating running as a warm-up or cooldown for station work. Schedule two to three standalone running sessions per week: one easy aerobic run, one structured interval session, and one optional longer effort. This builds the aerobic base that drives VO2max improvement and running economy — both direct predictors of HYROX race performance. - Add Threshold Work
Tempo runs at lactate threshold pace (comfortably hard, roughly 80–85% of max heart rate) teach your body to sustain speed while clearing metabolic byproducts. A weekly 20-minute tempo or 4 × 5-minute threshold intervals will improve the pace you can hold across eight 1 km segments without blowing up. - Train Compromised Running
This is the secret weapon of concurrent training for hybrid fitness. Running on pre-fatigued legs — immediately after heavy squats, sled work, or a wall ball set — simulates what actually happens in a race. Start with 10–15 minutes of easy running post-strength once per week and build from there. The goal is teaching your legs to maintain form and turnover when they’d rather stop. - Progressively Overload Running Volume
Just as you’d add weight to a barbell, add distance to your weekly running total gradually. A 10% increase per week is the classic guideline. Track your weekly kilometres so running volume gets the same intentional progression as your station lifts.
Build Your Running Engine
The athletes who podium at HYROX don’t just survive the running — they use it to create gaps. When nearly 60% of your race is spent on the road, the return on investing in your running fitness is unmatched.
If you want a structured approach to building all three engines — running capacity, strength endurance, and compromised running — REPZ (https://repz.app) is a training app designed specifically for this. It programs your week so running gets the priority the science says it deserves, launching late June 2026.
Usman is a coach and contributor at REPZ (https://repz.app), a training app built for HYROX athletes who want science-backed programming that treats running as a first-class priority.
References
- Brandt, T., Ebel, C., Lebahn, C., & Schmidt, A. (2025). Acute physiological responses and performance determinants in Hyrox — a new running-focused high intensity functional fitness trend. Frontiers in Physiology, 16, 1519240. https://doi.org/10.3389/fphys.2025.1519240
- Zanini, M., Folland, J. P., Wu, H., & Blagrove, R. C. (2025). Strength training improves running economy durability and fatigued high-intensity performance in well-trained male runners. Medicine & Science in Sports & Exercise, 57(7). https://doi.org/10.1249/MSS.0000000000003685
- Villarroel López, P., & Juárez Santos-García, D. (2025). High intensity functional training in hybrid competitions: A scoping review. Journal of Functional Morphology and Kinesiology, 10(4), 365. https://doi.org/10.3390/jfmk10040365