Aerobic Threshold

By the Watta Team · Updated

Aerobic Threshold: The aerobic threshold is the exercise intensity where lactate begins to rise above resting levels, typically around 55-70% of VO2 max in trained rowers.

What is Aerobic Threshold?

The aerobic threshold (AeT) marks the transition from easy, primarily fat-burning exercise to moderate intensity where carbohydrate metabolism increases. Below the aerobic threshold, the body can sustain exercise almost indefinitely. Training at or just below this threshold (UT2 zone) develops the aerobic base that underpins all rowing performance. In heart rate terms, the aerobic threshold typically corresponds to 60-70% of heart rate reserve for trained rowers. Blood lactate at the aerobic threshold is approximately 2 mmol/L. The aerobic threshold improves with consistent training, allowing athletes to maintain higher paces at the same physiological cost. This is the primary target of steady-state training in rowing.

How Watta Uses Aerobic Threshold

Watta's heart rate zone system identifies your aerobic threshold zone (Zone 2) using the Karvonen method. By tracking your pace-to-HR ratio across sessions, Watta helps you monitor aerobic threshold improvements over time through the Aerobic Efficiency metric (watts per heartbeat).

Further Reading

Frequently Asked Questions

What is aerobic threshold in rowing?
The aerobic threshold is the intensity where lactate starts to rise above baseline, usually around 60-70% of heart rate reserve. It is the upper limit of easy, conversational rowing.
How do I find my aerobic threshold?
The most accurate method is a lactate test. A practical estimate is the heart rate at which you can just barely maintain a conversation while rowing. This typically falls at 60-70% of your heart rate reserve.
Why is aerobic threshold important for rowing?
The aerobic threshold determines the pace you can sustain for long sessions. Improving it means you can row faster at the same heart rate, or the same pace feels easier. It is the foundation for all rowing performance.
What is the difference between aerobic and anaerobic threshold?
The aerobic threshold (~2 mmol/L lactate) is the lower boundary where lactate starts rising. The anaerobic (lactate) threshold (~4 mmol/L) is the upper boundary where lactate accumulates rapidly. Training between them develops UT1/tempo fitness.
How do I improve my aerobic threshold?
Consistent UT2/steady-state training below your aerobic threshold is the most effective way to raise it. As your aerobic base improves, you will be able to hold faster splits at the same heart rate.

Related Content

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.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.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.Karvonen FormulaThe Karvonen formula calculates personalised heart rate training zones using heart rate reserve: Target HR = Resting HR + (Intensity % × (Max HR - Resting HR)).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.VO2 Max (Rowing)VO2 max in rowing is the maximum rate of oxygen your body can use during exercise, measured in mL/kg/min, and is the strongest predictor of endurance rowing performance.HR Zone CalculatorHeart Rate Training for RowingSteady State Rowing GuideFor Competitive Rowers
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