UT1 Training (Threshold)

By the Watta Team · Updated

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.

What is UT1 Training (Threshold)?

UT1 is the second-lowest training intensity zone in rowing, sitting between UT2 (aerobic base) and AT (anaerobic threshold). UT1 corresponds to approximately 75-85% of maximum heart rate and is often called "threshold" training because it sits near the lactate threshold — the point where lactate production begins to exceed clearance. UT1 effort feels "comfortably hard" — you can speak in short sentences but not hold a conversation. Typical UT1 workouts include 3-4 x 10-15 minutes at threshold pace with 3-4 minutes rest, or 2 x 20 minutes with 3 minutes rest. UT1 makes up approximately 10-15% of a well-structured rowing programme. It bridges the gap between easy aerobic training and hard race-specific intervals.

How Watta Uses UT1 Training (Threshold)

Watta identifies UT1 training through heart rate zone analysis. The Cardiac Load component of the Effort Score applies non-linear scaling that differentiates UT1 from UT2 effort, appropriately weighting the greater physiological demand of threshold training.

Further Reading

Frequently Asked Questions

What is the difference between UT1 and UT2?
UT2 is easy aerobic training — 55–65% of 2K power, 60–70% of heart-rate reserve, 134–148 bpm for a 190 max and a 50 resting rate. UT1 is the next band up at 65–75% of 2K power, where lactate starts to rise. UT2 should feel easy; UT1 should feel comfortably hard. UT2 builds the aerobic base, UT1 raises the lactate threshold, and most of your volume belongs in UT2.
How much UT1 should I do per week?
UT1 should make up approximately 10-15% of total training volume. For a rower training 5 sessions per week, that is roughly 1 dedicated UT1 session. Doing too much UT1 creates accumulated fatigue without adequate recovery.
What pace is UT1 on the erg?
UT1 pace is approximately 10-15 seconds per 500m slower than your 2K pace. If your 2K split is 1:45, UT1 is around 1:55-2:00. Heart rate should be 75-85% of maximum. If HR and pace disagree, trust heart rate.

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.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.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.Anaerobic ThresholdThe anaerobic threshold (AT2 or LT2) is the exercise intensity above which lactate accumulates faster than the body can clear it, marking the upper limit of sustainable effort.Heart Rate Training ZonesHeart rate training zones divide your heart rate range into intensity bands (typically 5 zones), each targeting different energy systems and physiological adaptations for rowing training.Steady State RowingSteady state rowing is continuous, easy-paced erging at conversational intensity for 20–90 minutes — the UT2 band, 55–65% of 2K power at 18–22 spm — used to build aerobic fitness.HR Zone CalculatorRowing Pace CalculatorHeart Rate Training for RowingSteady State Rowing GuideFor Competitive Rowers40-Min Tempo Row
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