Our scienceWe don't estimate what we can measure.
Most training plans are built on assumptions about people like you. Yours is built on measurements of you.
VO2 Max
#1 Health PredictorYour body's maximum capacity to produce energy. One of the strongest predictors of how independently you'll live decades from now.
Your Limiter
There are three components that make up VO2 max: Lung function to pull in oxygen, heart function to pump it to your muscles, and muscle function to extract the oxygen from your blood.
The number everything else is built on
VO2 max is one of the strongest predictors of how long you will live, and the number your training zones are built from. Your watch estimates it from your pulse. We measure it directly, from the air you breathe out.
The scale cannot see the fat that matters
The fat under your skin is mostly cosmetic. The fat around your organs is the one linked to metabolic disease, and a scale cannot tell them apart. We measure it directly.
Your Fat
How much fat you carry, how it's distributed, and whether it's the kind that matters for metabolic health.
Healthy range (18-24%) for men
We find the one thing holding you back
In hospital, exercise testing is used to discover whether the heart, lungs, or muscles are making patients breathless. We apply the same science to find which system is holding you back, and point your hard sessions at it.
VO2 Max
#1 Health PredictorYour body's maximum capacity to produce energy. One of the strongest predictors of how independently you'll live decades from now.
Your Limiter
There are three components that make up VO2 max: Lung function to pull in oxygen, heart function to pump it to your muscles, and muscle function to extract the oxygen from your blood.
This is not AI slop
Your programme is not written by a chatbot. We built it from the physiology up, in code, against published exercise science. AI does one job here, fitting that science to you.
Base
WK 1-4
Build
WK 5-8
Peak
WK 9-12
We don't do blood tests
We could. Most of this industry does. But a blood panel tells you something is off without telling you what to do about it on Tuesday morning. We only measure what changes your training.
Start with your numbers.
Archie builds your plan from what we measure, then keeps it current as you train.
One month free. Then £29.99 a month.