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HYROX / FITNESS PROFILING

Marathon fitness. Race-ready legs.

38 years · 76 kg · Men’s Open scenario · Five training days · 12-week block

A 3:02 marathon suggested a strong endurance base. Yet a controlled kilometre slowed from 4:10 when fresh to 5:20 after a station circuit. In a full HYROX-style simulation, repeated stations made the running progressively harder.

The goalCarry running ability through the stations and complete the same full simulation in under 1:30.

Worked examples. Athlete details, measurements and results are simulated to demonstrate how profiling informs training.

WHAT THE PROFILE REVEALED

Train the transition, not just the running.

The aerobic base was strong. The bigger opportunity was to improve force capacity, manage station intensity and practise settling back into a sustainable run with tired legs.

01 / MEASURE

What we measured and why.

Read the measures together, in the context of the athlete’s goal.

Endurance already in place

59 mL/kg/min

SpiroFit VO₂ max and lactate LT2 at 4:00/km confirmed a strong base. INSCYD added a modelled metabolic profile.

Force lost after stations

24.2% drop

VALD jump height fell from 33 to 25 cm after the circuit. Ochy contact time increased from 238 to 276 ms at a fixed running pace.

Recovery between efforts

78 seconds

Train.Red measured local muscle-oxygen recovery. Blood lactate remained at 6.7 mmol/L five minutes after the circuit.

Hydration demands

1.40 L/h

Sweat analysis estimated 1,100 mg sodium/L in the test conditions, informing a practised, tolerable hydration plan.

SpiroFit · INSCYD · Blood lactate · VALD ForceDecks & DynaMo · Ochy · Train.Red · Sweat analysis

02 / APPLY

How the training changed.

A focused block, with a clear purpose behind each change.

01

Practise station-to-run transitions

Once weekly, alternate controlled station work with short runs. Keep the first running minutes deliberate.

Training stimulusDevelop the ability to recover while moving and avoid an unsustainable restart.

02

Build force capacity

Use progressive lower-body strength twice weekly, plus technically controlled sled and lunge practice.

Training stimulusMake station demands more manageable and retain force afterwards.

03

Keep the engine; rehearse the race

Retain easy endurance work. Practise station pacing, transitions, fuelling and drinking in longer specific sessions.

Training stimulusBring the existing running ability into the event without adding unnecessary fatigue.

03 / REVIEW

Did it change what mattered?

Results after 12 weeks. Reassessment follows the original question.

THE CHANGE WE TRACKED

More running pace after the work

Time for 1 km after the same station circuit

Baseline5:20
Week 124:35
Lower is better. The same circuit, load and transition timing at both visits. The post-station kilometre improved by 45 seconds in this scenario.
Baseline and follow-up results
MeasureBaselineWeek 12
Total simulation time1:34:301:26:40
Combined eight 1 km runs39:2035:40
Jump-height loss after circuit24.2%11.4%
Local muscle-oxygen recovery78 s50 s

The programme preserved endurance while addressing station demands and recovery. Better running, station execution and transitions all contributed to the result.

These examples show a combined training response, not proof that a particular test caused an improvement. The full case study explains the protocols, model estimates and measurement limitations. The assessments and follow-up span several visits.

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Explore the full case study

Eight pages of findings, graphics, training detail and supporting methods.

Open HYROX PDF (opens in a new tab)

A DIFFERENT PERFORMANCE QUESTION

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