HYROX Divisions Explained: How to Choose Open vs Pro vs Doubles vs Relay (Without Guessing)

TrainingRaceDay

Choosing a HYROX division is more than a checkbox. It changes how heavy things are, how the race feels, and what “smart pacing” even means.

Here’s a practical way to pick the right division for this season — and set yourself up to level up later.

Disclaimer: general training info, not medical advice.

Start with the simplest decision tree

  • Open Singles: best default for most first-timers (cleanest learning experience).
  • Pro Singles: choose it if you want the heavier challenge and you’ve earned it in training.
  • Doubles: choose it if you have a partner with similar running fitness and you’ll practice changeovers.
  • Relay: choose it if you want the HYROX experience with team energy and less continuous fatigue.

If you’re still unsure after reading that: Open Singles is usually the safest “no regrets” pick.

Open Singles: the best baseline

Open Singles is HYROX in its purest form:

  • you do every station
  • you do every run
  • your strengths and leaks are obvious

That’s why it’s such a good baseline. It teaches repeatability: can you execute eight station efforts without your running falling off a cliff?

Source summary + link: Fitness Experiment’s simplified HYROX rules page covers core competition rules and notes eligibility basics like the 16+ age requirement across divisions. https://fitnessexperiment.co/hyrox/rules/

Pro Singles: pick it for a reason (not a vibe)

Pro isn’t “Open, but cooler.” It’s a different problem.

The common mistake is thinking you’ll just “try harder” and keep the same 1K run pace. Heavier stations tend to create bigger spikes in breathing, legs, and grip — and those spikes show up immediately in the next run.

Pro is a good choice if:

  • you’ve raced Open confidently and can keep your runs honest after the sleds
  • your training includes strength endurance (not just a few heavy reps)
  • you care more about the challenge than protecting a pretty finish time

A useful gut-check: if your Open race already ends with survival-shuffling, Pro is more likely to be punishing than productive right now.

Doubles: faster, more social… and more strategic

Doubles can be an amazing race day, but it adds a constraint: you run together.

If partners have very different running fitness, the whole day turns into one athlete being frustrated and the other being stressed.

Doubles is a good choice if:

  • your run pace is similar under fatigue
  • you have complementary station strengths
  • you’ll rehearse a changeover plan (not invent it mid-race)

Source summary + link: PureGym’s HYROX Doubles explainer describes Doubles as a two-person format where teams can divide station work, while both athletes still complete the runs together and are expected to stay close (commonly summarized as within ~15 seconds). https://www.puregym.com/blog/hyrox-doubles/

Source summary + link: Speediance’s overview reinforces the idea that Doubles keeps the same run + station structure as singles, with the “advantage” coming from how well you split work and communicate. https://www.speediance.com/blogs/fitness/how-does-hyrox-doubles-work

A simple Doubles rule of thumb

Don’t swap when you’re destroyed.

Swap when your pace is still crisp.

Short, repeatable chunks (instead of “I’ll take the whole station”) usually keeps form clean and gets you back to running sooner.

Relay: the best “gateway” division

Relay is ideal if you want the HYROX vibe with a team and less continuous grind. You still need to be fit — the stations can bite — but many athletes find relay a great entry point because you can race hard for your segments without managing eight full cycles of station-to-run fatigue.

The final 5-question checklist

Before you register, answer honestly:

  1. Do I want a solo test or a shared test?
  2. Can I keep running form when fatigue spikes?
  3. If it’s Doubles, are we similar runners?
  4. Have I practiced the movements under standards?
  5. What’s my “win condition” today: learning, fun, time, or placement?

Pick the division that best matches that reality — then train specifically for that format.