From CrossFit to HYROX: A Belltown Athlete's Story

Aman walked into Persistence as a CrossFit Open athlete. 12 weeks later he finished his first HYROX.

The first time I saw Aman in a HYROX-style metcon, he was carrying the room. Strong squats, fast burpees, clean wall balls. He had been doing CrossFit at Persistence Athletics in Belltown for two years and he had already done two CrossFit Opens. He had the strength, the gym fitness, the work capacity. He was ready for the stations on day one.

Then we sent him out for a 5 km run at conversational pace as part of the assessment. He came back 30 minutes later, frustrated. The strength was there, the engine was not. His best 1 km was 5:30 in fresh state, and he could only hold it for one. By kilometer 3 he was at 6:30. By kilometer 5 he was walking.

That gap, between the strength of a CrossFit athlete and the run base of a HYROX racer, is the gap most CrossFitters need to close to race well. Aman closed it in 12 weeks. He came in at 1:33 in his first HYROX Singles, which is a top-third finish for a first-timer.

This is his story. The intake, the programming shifts, and what changed week by week. I'm Jacque Dewangan, CFL3 and Precision Nutrition Level 2, head coach at Persistence Athletics. Updated April 2026.

(Note: Aman is a representative archetype based on real Persistence members. The training programming and timeline are exactly as we run them.)

Table of Contents

• The starting point: CrossFit-strong, run-light
• Phase 1 (weeks 1-4): aerobic base building
• Phase 2 (weeks 5-8): HYROX-specific work
• Phase 3 (weeks 9-12): race-pace simulations and taper
• Race day and what changed
• How we run CrossFit-to-HYROX programs at Persistence
• Frequently Asked Questions

The starting point: CrossFit-strong, run-light

Aman's intake screen at the start of his 12-week block looked like this.

Strength. Back squat 1RM 315 lb. Deadlift 405 lb. Press 175 lb. Strong relative to bodyweight, especially at his frame.

Stations (fresh state). SkiErg 1000 m at 4:15. Sled push 50 m at 1:45. Wall balls (50 reps unbroken) under 3 minutes. Burpee broad jumps 80 m at sub-4 minutes. All comfortable, all CrossFit-rep ranges he had been doing for years.

Running. This is where the gap was. Best 1 km fresh was 5:30. Best 5 km was 33 minutes (about 6:30/km pace). Above 5 km had not been tested. He had not done a sustained run over 30 minutes in two years.

Heart rate response. Elevated quickly during runs. Peak HR was high but recovery was slow. Classic profile of a strong-engine athlete who has not built a deep aerobic base.

The plan was simple in shape. Build the run base in phase 1. Layer HYROX-specific work in phase 2. Race-pace simulate in phase 3. The strength training would maintain rather than progress, because adding strength volume on top of run volume tanks recovery for athletes already at a high training age.

Phase 1 (weeks 1-4): aerobic base building

The first 4 weeks were almost entirely about running. Aman cut his CrossFit volume from 5 days a week to 3, and added 3 dedicated run sessions.

Weekly structure

• Monday: CrossFit class (regular programming)
• Tuesday: Easy run, 30 to 40 minutes at conversational pace (zone 2)
• Wednesday: CrossFit class
• Thursday: Run intervals, short. 6 to 8 x 400 m at moderate effort with 90 second rest
• Friday: Rest or mobility
• Saturday: HYROX class at Persistence (race-pace exposure)
• Sunday: Long easy run, building from 5 km to 8 km across the 4 weeks

What changed

By the end of week 4, Aman could hold 5:30/km for 5 km without his HR spiking. His aerobic base had built enough that he could repeat hard efforts without his recovery falling apart. The CrossFit work felt easier because his cardio system had more headroom.

His main complaint at the end of phase 1: he missed the heavy CrossFit days. The trade-off is real. To get HYROX-ready you have to give some volume back. Aman accepted it because he understood the timeline.

Phase 2 (weeks 5-8): HYROX-specific work

Phase 2 layered the HYROX-specific stations on top of the run base. The runs got slightly faster, the stations became HYROX-flavored, and the pacing started to take shape.

Weekly structure

• Monday: CrossFit class
• Tuesday: Threshold run intervals (4 x 1 km at goal HYROX pace + 30 seconds, with 2 minute rest)
• Wednesday: HYROX-specific metcon (3 to 4 stations at race pace, with 1 km runs between)
• Thursday: Strength maintenance (squat, hinge, press, pull) plus easy aerobic 20 minutes
• Friday: Rest
• Saturday: HYROX class at Persistence (longer race-pace exposure, 4 to 6 stations)
• Sunday: Long run, 8 to 10 km at conversational pace

What changed

By week 6 Aman could hold 5:00/km for 5 km. His station times remained strong (the CrossFit base was still there). His ability to chain stations and runs together was the new skill. The first time he ran 1 km straight into a sled push and back into a 1 km run, his second run was 30 seconds slower than the first. By week 8 the gap was 10 seconds.

The HYROX class at Persistence is where this work happened in coached form. Members preparing for races attend Saturday HYROX consistently across phases 2 and 3. Aman was there every week.

Phase 3 (weeks 9-12): race-pace simulations and taper

Phase 3 was three race-pace simulations and a taper. The structure was less about adding fitness and more about practicing the race itself.

Week 9

Partial sim: 4 stations + 4 km of running at race pace. Aman ran the partial sim in 41 minutes, which projected to roughly 1:35 for a full HYROX. We adjusted his pacing target down by 5 percent.

Week 10

Full sim: all 8 stations + 8 km of running at race pace. Aman ran the full sim in 1:36, which was 1 minute slower than projection because he over-paced the first 1 km (4:45 instead of 5:00) and crashed at station 4. We worked through the pacing protocol with him for the next two weeks.

Week 11

Partial sim with corrected pacing: 5 stations + 5 km of running at intentionally easier first 1 km. Result: more even splits, no station crash, projected 1:32 for full race.

Week 12

Taper. Reduced volume by 50 percent. Two short workouts, one easy run, one mobility session. Race on Saturday. The taper is non-negotiable. CrossFit athletes often want to keep training hard up to race day. They underperform on race day if they do.

Race day and what changed

Aman raced HYROX Singles in 1:33. First-time race. Top-third finisher. His station splits were within 5 percent of his fresh-state benchmarks, which means he paced correctly and arrived at each station with the right amount of fatigue.

Two things he said after the race that I remember.

First: "I had so much in the tank for the wall balls. I was scared of the wall balls all 12 weeks and they were the easiest part."

Second: "The first 1 km was the hardest part. Holding back when my legs felt fresh was the discipline I did not have at the start of prep."

Both observations are textbook for CrossFitters racing HYROX. The strength-based stations feel manageable because they are CrossFit movements. The pacing discipline is what they have to learn.

After the race, Aman went back to his regular CrossFit programming. He did the next CrossFit Open in February and posted a personal best on the metcons because his aerobic base had jumped a level. The HYROX cycle made him a better all-around athlete, not just a HYROX racer.

This is the pattern we see across most CrossFit-to-HYROX members.

How we run CrossFit-to-HYROX programs at Persistence

Persistence Athletics in Belltown runs a HYROX program that integrates with our regular CrossFit programming. Members can do HYROX-specific prep cycles 2 to 3 times per year (typically spring and fall) while maintaining their CrossFit routine in between.

The program structure is the same one we used with Aman: 12 weeks of progressive prep with a clear taper. Members who want one-on-one programming during their cycle work with one of our coaches; the broader HYROX class on Saturdays is open to all members.

For other member transformation stories, our member transformations hub collects 5 case studies including Aman, Eric's chronic back pain story, and others. Each links to a longer post if you want the full story.

For the philosophy behind how we coach, see our about page. For our regular CrossFit programming and how it integrates with HYROX prep, see group classes.

The pattern Aman followed is repeatable. CrossFitters who give themselves 12 to 16 weeks of focused HYROX prep, who add the run volume, who practice the race pace, who taper properly, almost all finish well in their first HYROX. The strength is already there. The work is closing the running and pacing gap.

Frequently Asked Questions

Can a CrossFit athlete transition to HYROX easily?

Yes, with some adjustments. CrossFit athletes already have the strength, the mixed modal capacity, and the gym fitness needed for the stations. The two main gaps are sustained running volume (CrossFit rarely programs 8 km of running in a single session) and pacing for a 60 to 120 minute event. With 12 weeks of focused prep, most CrossFit athletes can perform well at their first HYROX.

What does a CrossFitter need to add for HYROX prep?

Three things. First, longer aerobic runs (3 to 8 km at conversational pace, 1 to 2 times per week). Second, race-pace simulations of HYROX-specific stations. Third, pacing practice for a longer-duration event. Most CrossFitters come into HYROX prep with the strength they need but with run volume that is too low for an 8 km race.

Will HYROX training hurt my CrossFit Open performance?

Not if it is timed right. HYROX prep done in the off-season (after the Open and before the next CrossFit season) actually improves Open performance because of the increased aerobic capacity. HYROX prep done during Open prep can compete for adaptive resources. Most of our members do HYROX in spring or fall and the Open in February.

How long does it take to go from CrossFit to HYROX-ready?

12 weeks is the standard prep timeline for athletes who are already fit. CrossFit athletes typically need a slightly longer aerobic ramp than this baseline (an extra 2 to 4 weeks of running base building) but can compress the strength and station training because the foundation is already there. Total prep window: 12 to 16 weeks.

Are HYROX stations harder for CrossFitters than for runners?

Stations are easier for CrossFitters than for runners. The sled push, sled pull, wall balls, and burpee broad jumps all have CrossFit equivalents. Runners often struggle with the strength components. The gap goes the other way for the runs: runners come into HYROX with a strong run base, CrossFitters often need to build it. Hybrid athletes have the best of both.

Should I do HYROX or CrossFit if I can only pick one?

Pick CrossFit if you want broad fitness, community, year-round programming, and skill diversity (gymnastics, Olympic lifting, varied modalities). Pick HYROX if you specifically want race events and a more focused training cycle. Most of our members do both: CrossFit as the year-round base, HYROX as the targeted race cycle 2 to 3 times per year.

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Try a free first class at Persistence Athletics

If you are a CrossFitter thinking about HYROX, your first class at Persistence Athletics in Belltown is free. Come to the Saturday HYROX class at 9:30 AM and run a station rotation. You will learn within 60 minutes whether HYROX is your next race.

Book your free class. Persistence Athletics, 3025 1st Ave, Belltown, Seattle. 8 minutes from Amazon, walkable from anywhere in downtown Seattle.

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