HYROX simulations are the closest thing you get to race day without actually racing. They are where your training gets tested under fatigue, where your pacing strategy either holds up or falls apart, and where most athletes discover exactly what they need to fix before they pin on a race number.

But most people do them wrong. Not because they are lazy or uncommitted, but because the rules of a good simulation are counterintuitive. This article breaks down the mistakes that cost athletes time and the adjustments that actually make a difference.

The Rules Most Athletes Ignore

The most common mistake is treating a simulation like a hard training session. You push hard, you finish exhausted, you feel like you have done something. But if your splits were all over the place, your transitions were chaotic, and you changed the order of stations to suit how you felt, you have not simulated a race. You have just done a hard workout in HYROX kit.

Rule 1: Do It in the Right Order

HYROX has a fixed station order. Your simulation needs to follow it exactly. Sled push before burpee broad jumps, wall balls before RowErg, farmer carry last. If you swap stations because your gym layout makes it easier or because you want to do the stuff you are good at when you are fresh, you are not simulating anything. You are just training your own version of a race that does not exist.

The order is not arbitrary. HYROX is designed so that each station compounds the fatigue of the last. Wall balls after a sled pull are brutal precisely because of what came before. If you separate them in training, you never build the specific adaptation you need.

Rule 2: Keep Your Run Splits Honest

In a simulation, most athletes run their first two or three 1km splits too fast and then fall apart. This teaches you nothing useful and usually leaves you limping through the back half. The point of a simulation is to practice holding your target pace across all eight runs, not just the ones where your legs still work.

If your goal time is 1:20, your target run split is roughly 4:10 to 4:20 per km. Run that in training. Not 3:55 on Run 1 and 4:45 on Run 7. Consistency is the skill you are building.

Rule 3: Time Your Transitions

Transitions are where races are lost and almost nobody practises them. In a simulation, you should know exactly how long each transition takes and be working to tighten them. Getting from the end of a run into a station should be a practised movement, not a moment of confusion and fumbling.

Elite athletes lose almost no time in transitions. Beginners often lose 30 to 60 seconds per station across the race. In an 8-station race, that is 4 to 8 minutes. More than the difference between most finish time brackets.

Rule 4: Do Not Skip the Stations You Are Bad At

Almost every athlete has one or two stations they quietly avoid in training because they are uncomfortable. The SkiErg if you have bad technique. Burpee broad jumps if you are tired before you start. Sled pull if it just destroys you every time.

Your simulation needs to include these stations at full effort in the correct order. If you skip them or go easy on them, you will hit them on race day under full fatigue with no practice and no strategy. That is when races fall apart.

Rule 5: Treat It Like Race Day

Eat the same food, at the same time. Wear your race kit. Start at roughly the same time of day as your race. Take your hydration seriously. If you are planning to use a specific gel strategy on race day, use it in the simulation. Find out if it works before you are standing at the SkiErg in front of a crowd.

A simulation that mirrors race day conditions is worth ten hard sessions that do not. The goal is not to suffer. The goal is to prepare.

How Many Simulations Do You Need

For most athletes preparing for their first HYROX, one full simulation in the 4 to 6 weeks before the race is enough. For more experienced athletes chasing a time goal, two simulations, one at 6 to 8 weeks out and one at 3 to 4 weeks out, gives you the data to refine your pacing and transitions without arriving at race day fatigued.

Do not run a full simulation in the final two weeks. You want to arrive fresh, not carrying residual fatigue from trying to squeeze in one more test.

What to Do With the Data

After every simulation, write down your run splits, your station times, and your transition times. Compare them to your target. Identify the one or two things that cost you the most time and build specific sessions around those weaknesses. That is what separates athletes who improve race over race from those who just keep doing the same thing and hoping for a different result.