Race Simulations Are Essential but Must Be Used Strategically
Race simulation is one of the most powerful tools in HYROX training, but it is also one of the most misused. The purpose of a simulation is to rehearse race-specific demands: the station-to-station transitions, the cumulative fatigue across 8 running segments, and the mental challenge of pacing over 75-100+ minutes. However, simulations carry a significant physiological cost. A full simulation creates neurological, muscular, and physiological fatigue that requires 5-7 days of extended recovery. This means every full sim replaces nearly a full training week. The solution is a tiered approach: Mini Sim, Half Sim, and Full Sim, each with a specific purpose, frequency, and place in your training cycle. Understanding when and how to use each tier separates strategic training from junk volume that leaves you overtrained on race day.
Three Simulation Tiers Explained
Mini Sim (30-40 minutes): 3-4x 1km runs + 3-4 stations. The Mini Sim is your weekly race-specificity tool during the build phase. It is not meant to replicate race day. It is meant to practise running on compromised legs after completing workout stations. A typical Mini Sim might include 3 runs of 1km interspersed with 3 stations such as SkiErg, Wall Balls, and Burpee Broad Jumps. The intensity should be moderate to hard, roughly 70-80% of race-day effort. Because the volume is low enough to recover from within 48 hours, you can run Mini Sims weekly without disrupting the rest of your training programme. Use Mini Sims to test pacing strategies, practise transitions, and build the neuromuscular pattern of running after station work.
Half Sim (45-60 minutes): 4x 1km runs + 4 stations. The Half Sim is the sweet spot for most HYROX athletes. It covers half the race: 4 runs and 4 stations, typically the first or second half of the official race order. The Half Sim provides enough race-specific stimulus to serve as a meaningful benchmark without the brutal recovery cost of a full simulation. Use it every 2-3 weeks during your training cycle. It is an excellent midpoint assessment tool: compare your Half Sim times across the training block to gauge fitness progression. A strong Half Sim approach is to alternate between the first half (SkiErg, Sled Push, Sled Pull, Burpee Broad Jumps) and the second half (Row, Farmers Carry, Sandbag Lunges, Wall Balls) on different sessions to cover all stations over a month.
Full Sim (75-100+ minutes): all 8x 1km runs + 8 stations at race weight and reps. The Full Sim replicates the complete HYROX race: 8 running segments of 1km each, interleaved with all 8 stations performed at your division's prescribed weights and repetitions. This is the ultimate race rehearsal. It tests your pacing strategy, fuelling plan, equipment setup, and mental endurance across the full duration. However, the physiological cost is immense. Full sims create deep fatigue across the nervous system, musculoskeletal system, and energy systems. Recovery takes 5-7 days minimum. For this reason, limit Full Sims to 1-2 per training cycle maximum. More than that and you are racing in training instead of building for race day.
HYROX race simulation station order: 1km Run + SkiErg 1000m, 1km Run + Sled Push 50m, 1km Run + Sled Pull 50m, 1km Run + Burpee Broad Jump 80m, 1km Run + Row 1000m, 1km Run + Farmers Carry 200m, 1km Run + Sandbag Lunges 100m, 1km Run + Wall Balls 75 reps (Open) or 100 reps (Pro). Follow this exact order in your Full Sim and Half Sim sessions for maximal race transfer.
When to Use Each Simulation and How to Execute
- Schedule Full Sims 6-8 weeks before your key race. This is the optimal window: far enough out that you have time to recover and adjust training based on insights, close enough that your fitness is race-relevant. Full Sims are also appropriate for newcomers establishing a baseline time, for doubles teams who need to practise communication and transition handoffs, and during organised training camps where coaching support is available. Never schedule a Full Sim in the final 2 weeks before your race. The risk of peaking at the wrong time, picking up an injury under accumulated fatigue, and burning out mentally is too high. Your final 2 weeks should be about tapering and sharpening, not testing.
- Use Half Sims as your primary benchmark. Every 2-3 weeks, run a Half Sim at race intensity. Track your total time including all transitions because transition time is your benchmark. A Half Sim gives you 80% of the race-specific data at 50% of the recovery cost. If your Half Sim times are improving, your race performance will improve. If they stall, you know where to adjust. For athletes training 4-5 days per week, the Half Sim replaces one full training day. For athletes training 6 days per week, it can be a hard session followed by an active recovery day.
- Run Mini Sims weekly during the build phase. Slot a Mini Sim into your training week as a race-specific session. Pick 3-4 stations that target your weaknesses. If your runs slow dramatically after sled work, your Mini Sim should include sleds. If Wall Balls destroy your run pace, include Wall Balls. The Mini Sim is a diagnostic and practice tool, not a test. Keep intensity controlled and focus on smooth transitions and consistent run splits.
- Substitutions for limited equipment. Not everyone has access to full HYROX equipment. No sled? Use heavy resistance band walks (40-50m) or a loaded prowler at equivalent effort. No SkiErg? Use an assault bike for 50 calories, which provides a similar upper-body and cardio demand. No rowing machine? Use a bike erg or 400m run at hard effort. Scale weights to match your division if your gym has different equipment from race standards. The goal is to replicate the fatigue pattern, not to match every variable perfectly.
- Track total time including transitions. Your simulation time is not the sum of your station times and run splits. It is the total elapsed time from start to finish, including every transition, every walk to the next station, every moment of rest. This is your true benchmark. Set a single running clock when you start your simulation and stop it only when the final rep is complete. Transition efficiency is where many athletes lose 3-5 minutes across a full race. Practising smooth station entries and exits is as important as station performance itself.
- Test your race-day equipment during simulations. Simulations are dress rehearsals. Wear the shoes, socks, and clothing you plan to race in. Use the same fuelling strategy. As fatigue accumulates across simulation segments, your running form degrades and foot mechanics change under load. Tracking how your body responds over the full duration reveals equipment issues that short training sessions never expose. The Arion running analysis system lets you monitor running form changes across each 1km segment, showing exactly where gait deterioration begins. Pairing that data with a supportive insole like the Shapes HYROX Edition helps maintain foot alignment as fatigue builds, giving you consistent ground contact from the first run to the eighth.
FAQ
How often should I do a full HYROX race simulation?
Maximum 1-2 times per training cycle. A full simulation creates deep neurological, muscular, and physiological fatigue that requires 5-7 days of recovery. Each full sim effectively replaces a full training week. More than 2 per cycle and you risk overtraining. Schedule them 6-8 weeks before your target race and never in the final 2 weeks before race day.
What is a half HYROX simulation workout?
A Half Sim is 4x 1km runs interleaved with 4 stations from the official HYROX race order. It takes 45-60 minutes and covers half the race. You can run the first half (SkiErg, Sled Push, Sled Pull, Burpee Broad Jumps) or the second half (Row, Farmers Carry, Sandbag Lunges, Wall Balls). The Half Sim provides strong race-specific stimulus without the brutal recovery cost of a full simulation. Use it every 2-3 weeks as your primary benchmark.
How long before my HYROX race should I stop doing full simulations?
Stop full simulations at least 2 weeks before race day. Ideally your last full sim is 6-8 weeks out. A full sim creates fatigue that takes 5-7 days to recover from, and doing one too close to race day risks peaking at the wrong time, picking up an injury, and arriving at the start line mentally and physically drained. The final 2 weeks should focus on tapering and race-day sharpening, not testing.
Can I do a HYROX simulation without a sled or SkiErg?
Yes. Substitute the sled push and pull with heavy resistance band walks or a loaded prowler for 40-50 metres at equivalent effort. Replace the SkiErg with an assault bike for 50 calories or a similar upper-body cardio effort. Replace the rowing machine with a bike erg or 400m hard run if needed. Scale weights to your division. The goal of a simulation is to replicate the fatigue pattern of alternating runs and stations, not to match every piece of equipment perfectly.
What is the correct station order for a HYROX race simulation?
The official HYROX race order with a 1km run before each station is: SkiErg 1000m, Sled Push 50m, Sled Pull 50m, Burpee Broad Jump 80m, Row 1000m, Farmers Carry 200m, Sandbag Lunges 100m, Wall Balls 75 reps (Open) or 100 reps (Pro). Follow this exact order in your simulations for the most accurate race rehearsal, as the cumulative fatigue pattern changes depending on station sequencing.
How long does a full HYROX simulation take?
A full HYROX simulation takes 75-100+ minutes for most athletes, depending on fitness level and division. Competitive Open athletes may finish in 70-80 minutes. Mid-pack athletes typically take 85-100 minutes. Newer athletes or those in Pro divisions with heavier weights may exceed 100 minutes. Track your total time including all transitions. This is your race-day benchmark.
What is the difference between a mini sim, half sim, and full sim?
A Mini Sim is 30-40 minutes: 3-4x 1km runs and 3-4 stations, used weekly during the build phase. A Half Sim is 45-60 minutes: 4x 1km runs and 4 stations, used every 2-3 weeks as a benchmark. A Full Sim is 75-100+ minutes: all 8x 1km runs and 8 stations at race weight, limited to 1-2 per training cycle. Each tier serves a different purpose: Mini Sims build race-specific habits, Half Sims track fitness progression, and Full Sims provide complete race rehearsal.
