Rowing UT2: What It Is and Why It Builds Your Engine
UT2 is rowing's easy aerobic base band. What it means, the heart rate and stroke rate to hold, how it fits the UT2–AN system, and how to row it well.
UT2, short for Utilisation 2, is the easiest of rowing's five training bands and where most of your training belongs. It is steady aerobic work at roughly 55–70% of maximum heart rate, at a low stroke rate of 18–20 strokes per minute, easy enough to hold a conversation. It is rowing's version of Zone 2.
What does UT2 mean?
UT2 comes from the five-band system used by British Rowing and World Rowing, originally a German/FISA framework. Easiest to hardest:
- UT2 (Utilisation 2): easy aerobic base · ~55–70% HRmax
- UT1 (Utilisation 1): firmer steady state · ~70–80% HRmax
- AT (Anaerobic Threshold): threshold work · ~80–85% HRmax
- TR (Oxygen Transport): VO₂max intervals · ~85–95% HRmax
- AN (Anaerobic): maximal, short · ~95%+ HRmax
"Utilisation" means using oxygen and fat efficiently. UT2 and UT1 are both aerobic base bands. UT2 is the easier one. Get your own bands in beats per minute from the rowing heart-rate zones calculator.
Fréquence cardiaque max
190bpm
| Zone | Plage | Ce que cela développe |
|---|---|---|
| UT2 | Utilisation 2 (UT2) 105–133 bpm | Longue base aérobie, le socle du volume en aviron. RPE 2–3, état stable, facile à parler. |
| UT1 | Utilisation 1 (UT1) 133–152 bpm | Endurance aérobie haute et efficacité. RPE 4–5, à l'effort confortable. |
| AT | Seuil anaérobie (AT) 152–162 bpm | Seuil lactique ; allure tenable sur distance de course. RPE 6–7, difficile mais contrôlé. |
| TR | Transport (TR) 162–181 bpm | VO₂max et transport de l'oxygène ; spécifique au 2k. RPE 8–9, très difficile. |
| AN | Anaérobie (AN) ≥ 181 bpm | Puissance anaérobie ; départs et sprints. RPE 9–10, maximal. |
UT2 · Utilisation 2 (UT2). Longue base aérobie, le socle du volume en aviron. RPE 2–3, état stable, facile à parler.
UT1 · Utilisation 1 (UT1). Endurance aérobie haute et efficacité. RPE 4–5, à l'effort confortable.
AT · Seuil anaérobie (AT). Seuil lactique ; allure tenable sur distance de course. RPE 6–7, difficile mais contrôlé.
TR · Transport (TR). VO₂max et transport de l'oxygène ; spécifique au 2k. RPE 8–9, très difficile.
AN · Anaérobie (AN). Puissance anaérobie ; départs et sprints. RPE 9–10, maximal.
- British Rowing et Concept2 utilisent un modèle à cinq bandes (UT2 → AN). La grande majorité de l'entraînement est un travail régulier UT2, qui développe le moteur aérobie dont dépend un 2k.
- Lorsque vous le connaissez, ancrez aussi ces zones à votre split 2k : l'UT2 se situe environ 20–30 s/500 m plus lent que l'allure 2k, l'AT autour de 8–12 s plus lent, et le TR proche de l'allure 2k.
Un PDF de vos résultats, avec un QR code pour les rouvrir à tout moment.
Why is UT2 so important?
The adaptations that make you a faster rower are built at easy intensity over many hours. UT2 develops aerobic endurance:
- Mitochondrial density: more cellular engines in the muscle.
- Capillarisation: more blood vessels delivering oxygen and clearing waste.
- Fat metabolism: sparing carbohydrate by burning fat.
- Stroke efficiency: long, low-rate work grooves a relaxed, repeatable stroke.
This is the same principle as polarized training and Zone 2 in running and cycling. A bigger aerobic base means you row faster before lactate piles up, recover quicker, and absorb more training.
How do I row in UT2?
Use several signals, because heart rate alone can mislead:
- Heart rate: inside your UT2 band, 55–70% of max. If you do not know your max, see finding your maximum heart rate.
- Stroke rate: 18–20 spm. Low rate forces length and leg drive.
- The talk test: full sentences. Snatching breaths means you have drifted into UT1.
- Your split: note the 500 m split that matches UT2 today, but treat it as a result of the effort, never a target.
A typical session is 40 to 90 minutes of continuous steady rowing. Longer and easy beats shorter and "productive."
The most common UT2 mistake
Rowing it too hard. The erg shows you a split and nudging it down feels like progress. Creeping into UT1 turns an easy day into a moderately hard one: enough to cost recovery, too little to drive adaptation. Keep the rate down, keep breathing conversational, and save hard efforts for AT, TR and AN sessions.
Expect cardiac drift on long pieces. Trust breathing and stroke rate over a few late high beats.
How much UT2 should I do?
In a well-structured rowing week, around 70–80% of volume sits in the aerobic bands (UT2 and UT1), with a smaller dose at threshold and above. For most recreational rowers that means mostly steady-state sessions plus one or two hard workouts. Beginners can go even easier while the base builds.
Olympic-level crews go higher still: published studies put the easy fraction at 77% to 94% of training volume. See how elite rowers train.
UT2 on the erg vs. on the water
Same physiology, different feedback. On the erg the monitor gives a precise split and rate, so holding UT2 is easy if you resist chasing the number. On the water, wind, stream and crew move the split constantly, so heart rate, stroke rate and feel lead. Either way: low rate, easy breathing, steady effort.
FAQ
Is UT2 the same as Zone 2? Yes. UT2 is rowing's name for the easy aerobic base zone other sports call Zone 2. The heart-rate ranges line up at ~55–70% of max.
What heart rate should UT2 be? Roughly 55–70% of your maximum heart rate. Get your exact band from the rowing zones calculator.
What's the difference between UT2 and UT1? Both are aerobic base bands. UT2 is easier and lower rate, and takes more of your volume. UT1 is a firmer steady state just above it at ~70–80% HRmax.
What stroke rate is UT2? 18–20 strokes per minute. The low rate builds length, leg drive and efficiency.
Sources
- World Rowing / British Rowing (FISA) UT2–AN training-band model, as used in Concept2 training guidance
- Seiler, training-intensity distribution
- San Millán, Zone 2 physiology