Season Reviews: How to Audit a Training Year Like a Coach
You audit a training year like a coach by reviewing the data you kept (races, field tests, training logs and adherence) against the goals you set, then asking what drove your gains,...
HYROX Intel
Perspectives on the sport. Written by our Athletes, and our Founders.
Hyrox Intel — Tagged "Programming"
Periodising HYROX Doubles: Two Athletes, One Plan
You periodise HYROX doubles by aligning two athletes' blocks around a shared race date while individualising the intensity inside each block. In doubles, partners run all 8 kilometres together and share the...
What Happens Physiologically in a Race Block?
In a race block your body stops building new capacity and starts sharpening what you already have. You convert threshold fitness into race-specific execution, dropping total volume while holding a little intensity...
The 12-Week HYROX Countdown: Block by Block
A 12-week HYROX countdown breaks into four three-week blocks: a base block for aerobic volume, a build block for strength endurance and compromised running, a race block for pacing and simulation, and...
Structuring Monday to Sunday: The Logic of Session Order
The logic of ordering a HYROX training week is simple: separate your hardest sessions, keep easy days genuinely easy between them, and never stack two high-fatigue efforts back to back. A well-ordered...
Double Days for Amateurs: When They Help and When They Hurt
Double days help amateurs when they let you fit more quality training into a constrained schedule and separate sessions that would interfere if combined, but they hurt when they simply add fatigue...
Why Random Workouts Stop Working After 12 Weeks
Random workouts stop working after about 12 weeks because your body adapts to whatever it repeatedly encounters, and once it has adapted to constant variety, novelty itself stops being a stimulus. THETA's...
Block Sequencing: What Comes First, Strength or Engine?
In HYROX block sequencing, the engine comes first for most athletes. You build a broad aerobic base early, then layer strength endurance and race-specific work on top of it. THETA's analysis of...
Progressive Overload Without Burnout: The 10% Myth Examined
Progressive overload means gradually increasing training stress so the body keeps adapting, but the popular "never add more than 10% a week" rule is a rough guideline, not a law. Sustainable overload...
Linear vs Undulating Periodisation for HYROX Athletes
Linear periodisation shifts your training gradually across a block, from high volume and low intensity toward low volume and high intensity, while undulating periodisation varies volume and intensity within each week. For...
Why Your Plan Should Change When Your Life Changes
Your plan should change when your life changes because training only works if you can actually complete it. A plan built for a good week becomes counterproductive the moment your sleep, stress,...
How Age Changes Periodisation: Recovery-Led Programming
Age changes periodisation by making recovery, not stimulus, the limiting factor. Older athletes adapt just as well to hard training but need longer to absorb it, so blocks tilt toward more frequent...
When to Repeat a Block Instead of Progressing
You repeat a block instead of progressing when the adaptations it targets have not yet landed. If your field markers have stalled, you missed sessions, or you never absorbed the last block's...
Tracking Block Progress Without a Lab: Field Tests That Work
You track block progress without a lab by using repeatable field tests (a 5K time trial, a threshold run at fixed heart rate, a broken-station benchmark and heart-rate-at-pace) run under standard conditions...
Why Fitness Arrives Weeks After the Work: The Delayed Training Effect
Fitness arrives weeks after the work because training is a stimulus, not an instant transaction. Your body needs time to absorb hard sessions, repair, and supercompensate, so the gains from a block...
What Happens Physiologically in a Build Block?
In a build block your body converts the aerobic base you laid down into HYROX-specific fitness. You develop lactate tolerance, raise the pace you can hold before fatigue floods in, and teach...