Critical Power for rowing
Train to power,
not to heart rate.
Zones built on the science.
Critical Power is the gold-standard physiological model used across endurance science. Give us a handful of tests you probably already do, and we'll hand you five training zones, 35 ready-made sessions, and a plain English explanation of what it all means.
The problem
Most rowers train to numbers that
don't reflect their physiology.
Heart rate zones, single test protocols, and lab-based testing all have a place. They also have real limitations that most rowers are never told about.
Heart rate has limits
Heart rate drifts with heat, hydration and fatigue, and lags behind changes in effort. Zones built on a percentage of maximum heart rate (especially from the 220 minus age formula) are rough guides, not tailored targets.
A single test misses the picture
One all-out effort gives you one number. It can't separate your sustainable aerobic ceiling from your finite anaerobic reserve, the two physiological systems you need to train completely differently.
Lab tests are hard to access
Lactate threshold and VO₂max tests are accurate but cost hundreds per session, need specialist equipment, and still hand you back zones tied to heart rate rather than the watts you'll actually pull on race day.
How it works
What Critical Power
actually measures.
CP is the highest sustainable aerobic output your body can hold. W′ is the finite anaerobic reserve you carry above it. Together they describe the two systems every rower depends on.
Use what you already do
A couple of standard erg pieces is all it takes. Most rowers already log at least two of the durations we need. Pull the numbers from your training log and you're set.
See your CP and W′
Your Critical Power is the highest output you can sustain aerobically. W′ is your finite anaerobic reserve above it. Together they describe your physiology, not someone else's.
Train with real targets
Five power zones tuned to your own numbers, 35 ready-made sessions with watt targets, and a downloadable individual report.
Why it matters
Four reasons rowers
choose Critical Power.
Power is honest
Watts respond instantly. They show exactly how hard you are working, no matter the weather, your sleep, or your caffeine.
Two systems, two numbers
CP and W′ separate your aerobic ceiling from your anaerobic reserve, so each one gets its own targeted training.
No lab needed
All you need is an erg and tests most rowers already do. Low cost, evidence based, and accessible anywhere.
Written for rowers
Every zone description, every session, and every interpretation is built around how rowing actually trains.
Ready to find
your Critical Power?
Create a free account and run the calculator right now. Upgrade any time for full zones, sessions and your individual report.