Polarised Training

By the Watta Team · Updated

Polarised Training: Polarised training is a training philosophy where approximately 80% of volume is at low intensity (UT2) and 20% at high intensity, with minimal time in the moderate threshold zone.

What is Polarised Training?

Polarised training is the dominant training model in elite rowing and endurance sport. The principle is simple: most training should be genuinely easy (UT2), and the remaining hard sessions should be genuinely hard (AT/TR/AN). The moderate "grey zone" between easy and hard (UT1/threshold) should make up only a small fraction of total volume. Research consistently shows that polarised training produces better endurance adaptations than threshold-focused or evenly distributed training. The reason: easy training develops the aerobic base without accumulated fatigue, while hard sessions provide the high-intensity stimulus needed for VO2 max and speed development. The grey zone provides a moderate stimulus but creates disproportionate fatigue.

How Watta Uses Polarised Training

Watta's Effort Score helps enforce polarised training. By tracking each session's score and zone (Recovery, Building, Training, Peak), you can verify that the majority of your sessions fall in the Recovery/Building zones (easy) with targeted sessions in Training/Peak zones (hard). If most sessions cluster in the "Building" zone, you may be training too hard on easy days.

Further Reading

Frequently Asked Questions

What is the 80/20 rule in rowing training?
80% of training volume at low intensity (UT2, RPE 3-4) and 20% at high intensity (intervals, testing). This is the polarised training model. It means most sessions should feel genuinely easy, which is counterintuitive for many athletes.
Why is the grey zone bad?
The moderate "grey zone" (UT1/threshold) creates significant fatigue but provides a weaker training stimulus than either true easy or true hard sessions. Too much grey zone training leads to chronic fatigue, stagnation, and overtraining. Keep easy days easy and hard days hard.
How do I implement polarised training?
In a 5-session week: 3-4 sessions of easy steady state rowing (UT2) and 1-2 sessions of hard intervals or testing. Monitor heart rate to ensure easy sessions stay truly easy. Use Watta's Effort Score zones to verify your intensity distribution.

Related Content

UT2 TrainingUT2 training is low-intensity aerobic rowing at 55–65% of 2K power — heart rate 60–70% of heart-rate reserve, 18–22 spm — and it forms the foundation of a rower's endurance fitness.Heart Rate Zones (Rowing)Heart rate zones in rowing are five intensity bands based on resting and max heart rate, used to target different training adaptations.Lactate ThresholdLactate threshold in rowing is the exercise intensity at which blood lactate begins to accumulate exponentially (approximately 4 mmol/L), representing the upper boundary of sustainable aerobic effort.UT1 Training (Threshold)UT1 (Utilisation Training 1) is the threshold training zone in rowing, performed at 75-85% of maximum heart rate, targeting lactate threshold development.Overtraining SyndromeOvertraining syndrome is a chronic state of accumulated fatigue from excessive training without adequate recovery, resulting in declining performance and health.HR Zone CalculatorEffort Score CalculatorSteady State Rowing GuideUT2 Training GuideFor Competitive RowersFor Rowing Coaches
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