Predict by components, not by one perfect split
A HYROX time prediction is a scenario built from eight run segments, eight workout stations and the time spent moving through the Roxzone. It is not a promise. Enter splits you can reproduce after a station, not fresh 1 km repeats from a track session.
The official Singles Rulebook available on 26 July 2026 describes eight approximately 1 km runs alternating with SkiErg, sled push, sled pull, burpee broad jumps, rowing, farmers carry, sandbag lunges and wall balls. Division loads and movement standards can change, so confirm the current rulebook and your event information before the final rehearsal.
Build three scenarios
| Scenario | Run assumption | Station assumption | Roxzone assumption | Purpose |
|---|---|---|---|---|
| Conservative | controlled compromised-run average | slower recent clean reps | generous transition time | opening plan |
| Rehearsed | median from two simulations | median valid station splits | observed transitions | most useful estimate |
| Stretch | only splits already repeated cleanly | no-rep-free best sustainable set | organised transitions | upper bound, not target |
If the stretch result needs every station best and every run best on the same day, it is not a credible plan.
Use valid repetitions in the inputs
A fast training split achieved with shortened lunges, shallow wall balls or an incomplete sled lane should not enter the model. The current official rulebook makes the racer responsible for the sequence, distance, load and movement standard; no-reps and penalties change the result.
For the final simulation:
- use your registered division's current loads;
- ask a partner or coach to judge the visible standards;
- record total station time, not just working time;
- include Roxzone travel and setup;
- stop the simulation before form or safety deteriorates.
The small published HYROX physiology study found that its eleven participants spent more total time running than at stations and that the event imposed sustained high physiological demand. The sample is too small to prescribe your pace, but it supports treating the running segments as a major part of the result rather than recovery between lifts.
Turn the estimate into training decisions
Choose the two largest rehearsable losses. A slow sled caused by insufficient specific strength calls for a different block than five loose transitions. Use the HYROX training hub for the build and the taper checklist to protect race week.
Safety and accuracy boundary
Do not use the predictor to justify racing through chest pain, faintness, severe breathing difficulty or an injury that changes movement. Seek appropriate medical support. This tool estimates time from assumptions; it does not assess readiness and is not medical advice.