You will spend about 60% of your first race running, not lifting sleds. That one fact should shape your whole 16-week plan: build the engine first, then add enough strength to move the weight.
In a 2025 simulated Open race, runs took 51.2 minutes and stations took 32.8 minutes out of 86.5 total (Brandt et al., Frontiers in Physiology). In short: the eight 1 km runs are the bigger half of the clock.
What the Research Says About Hyrox Performance
The same study checked what predicted finish time. Aerobic capacity (VO2max, the size of your engine) did, with a correlation of -0.71. Weekly endurance volume did too, at -0.68. Grip strength, muscle mass and resistance-training volume did not.
Translation: the athletes with the biggest engines finished faster, not the ones who lifted the most.
There’s a catch. Only 11 people took part, so the study has low power. Larger data on elite athletes (Rappelt and colleagues, as summarized by a sports scientist) suggests the pros are closest together on running. That sample excluded Open athletes, so don’t stretch it to you.
Does Lifting Ruin Your Running?
Mostly no. A 2022 meta-analysis of 43 studies found little to no interference for max strength or muscle size when people combined running and lifting (Schumann et al.). Explosive power was the exception, mainly when both were done in one session. An older analysis found that more running volume dulled strength gains, with running worse than cycling (Wilson et al.).
In short: lift and run in the same week without fear. Just don’t stack them back to back. For more on keeping muscle without losing speed, see hypertrophy for Hyrox without wrecking run splits.
Think of your body as a phone with one charger. Plug in two hungry apps at once and both charge slowly. Space them out and each gets a full charge.
The Spacing Rule: 6 Hours Minimum
In a 7-week study of 58 rugby players, putting strength and endurance in the same session was worst. A 6-hour gap was better but still suboptimal, and 24 hours looked best (Robineau et al.). Those were rugby players, not Hyrox athletes, so take the principle and skip the exact numbers.
Your rule:
- Hard run and heavy lower-body day: at least 6 hours apart, 24 when possible.
- Never put your heaviest squat day the day before a key run.
- If you must double up, run easy in the morning and lift in the evening.
Plan the week around this and most interference problems vanish.
What Sub-75 Actually Asks of Your Legs
The math is plain. Take 75 minutes, subtract your total station time, and divide the rest by eight runs.
| Total station time | Time left for 8 runs | Average 1 km split |
|---|---|---|
| 26 min | 49 min | 6:07 |
| 28 min | 47 min | 5:52 |
| 30 min | 45 min | 5:37 |
| 32 min | 43 min | 5:22 |
| 34 min | 41 min | 5:08 |
These are illustrative and include Roxzone transitions. A runner with 30 minutes of stations needs about 5:37/km on average. At the 32.8-minute station time from the 2025 study, you’d need about 5:17/km.
Sub-75 is roughly top quartile for Open men, going by third-party aggregates. Those sources conflict, and Hyrox publishes no official percentiles. Treat it as a strong first goal, not a guarantee. If you’re new, finishing is the first win.
Pacing matters as much as fitness. Most athletes start Run 1 too fast. Read why half-marathon pace is the smarter target and how to stop the running fade.
The 16-Week Template
Four phases. Each has one job.
| Weeks | Phase | Runs / week | Strength days | Key session |
|---|---|---|---|---|
| 1-4 | Base | 3 (mostly easy) | 2 (full body) | Long easy run, 60-75 min |
| 5-8 | Build | 3 | 2 (heavier lower body) | Tempo run, 20-30 min at threshold |
| 9-13 | Specific | 3 | 2 (station-based) | Station-to-run brick |
| 14-15 | Peak | 3 | 1-2 (lighter) | Half-race simulation |
| 16 | Taper and race | 2 short | 1 light | Short sharpener 4-5 days out |
Make weeks 4, 8 and 12 recovery weeks: drop volume by about a third. Your body adapts in the easy week, not the hard one.
What a week looks like in Base and Build
In Base, keep it boring on purpose. Run easy on Monday for 35 minutes. Lift full body on Tuesday and Friday. Run again on Wednesday for 40 minutes. Do your long easy run on Sunday. You should finish every session feeling you could do more.
In Build, one run turns into a tempo. Warm up 10 minutes, then hold 20 to 30 minutes at a pace you could talk through in short phrases only. Translation: hard, but steady. Your lower-body lifting gets heavier here, so keep it away from the tempo day.
A typical Specific-phase week
- Mon: Easy run, 40 min.
- Tue: Strength, lower body focus (morning).
- Wed: Intervals, 5 x 1 km at goal pace (evening).
- Thu: Strength, upper body and carries.
- Sat: Brick. Sled push and pull, then 1 km at goal pace, repeated 4 times.
- Sun: Long easy run.
Tuesday morning’s heavy legs sit more than 24 hours before Wednesday evening’s intervals. That’s the spacing rule at work.
The Saturday brick matters most. The first minutes of running after a hard station feel wrong. Your legs are heavy and your breathing is high. You need to rehearse it. For the reasons, see compromised running, and practice your handoffs with Roxzone transitions.
Fast legs are built in the easy weeks.
Test yourself at weeks 9 and 13
A simulation tells you if the plan works. Twice, run a half-race: four stations with a 1 km run before each. Use the real weights if you can. Hold your goal pace on the first run, not faster.
Write down your four run splits and your station times. If the last run is more than 20 seconds slower than the first, your pacing was too hot or your base is thin. Fix that before you add more hard work. If the splits stay even, move on with confidence.
Build Your Hyrox Season Plan Around Warning Signs
Cut volume when you see these:
- Resting heart rate up 5+ beats for several mornings.
- Easy pace feels hard for a week.
- Two sessions in a row you can’t finish.
- Nagging pain in one spot.
When two or more show up, take an easy week. Don’t make up the missed work.
A First-Timer Example
Take a hybrid athlete I’ll call Dan: 34, a former CrossFit lifter, 5K around 24:30. His first simulation took about 88 minutes. His runs averaged 6:50/km, which is 54:40 for all eight, and they faded after Run 4. Stations and transitions added roughly 33 minutes.
He followed the template above for 16 weeks. He ran three times a week and lifted twice, kept heavy legs a day away from intervals, and did a brick every Saturday from week 9. By race day his runs averaged 5:20/km, or 42:40 in total. His stations took about 29 minutes and Roxzone transitions about 2.5 more. That’s 31.5 minutes off the run clock, a bit above the 30-minute row in the table, so his pace needed to be near 5:26. He beat it.
Final time: 74:10. (Dan is fictional, and the numbers are illustrative.)
He lifted less than before. He ran more. The clock followed.
How AthleteOS Keeps the Plan Honest
AthleteOS builds a 16-week training plan with run and strength sessions on one workout calendar. It tracks your combined training load across running and strength, so you can see when hard days are piling up. If you miss a session, the plan adjusts instead of leaving you guessing. You can start with the 14-day trial and set your goal.
AthleteOS won’t predict your finish time. Use the pace table above for that, then check it against your real brick sessions.
If you’re short on kit, you can still follow the plan. See how to train for Hyrox with minimal equipment.