Stop guessing your training.
Anchor it to your physiology.
Know what easy actually is.
Know where threshold really lives.
Know your red line.
Train with certainty.
Takes 60 seconds. No credit card required.
Built from 1,000+ VO₂max & lactate tests
Your Real Zones
Easy, Threshold, VO₂max — anchored to your current physiology, not age formulas
Your Week Built
See exactly what sessions to run and at what pace — purpose-driven, not guesswork
Adapts With You
Paces recalibrate as you train — your red line moves, your plan follows
Step 1 of 3
What are you training for?
We'll anchor your paces and sessions to your goal event
Step 2 of 3
What's your current ability?
This anchors your training paces to where you are now — not where you want to be
Use your most recent race or hard effort
Critical Speed Field Test
Run a 3-minute and 12-minute all-out time trial to calculate your exact training zones.
How it works:
Don't have test data yet?
Here's how hard you should train right now
Paces anchored to your current physiology — not wishful thinking
Your next week
Want this week saved — and next week built automatically?
Enter your email to save your paces and get your training guide
Unlock your full training plan
£9.99/month — your red line, tracked and trained
No commitment. Cancel anytime.