Heart Rate Zones (Rowing)
By the Watta Team · Updated July 2026
What is Heart Rate Zones (Rowing)?
Heart rate zones divide cardiovascular effort into five bands, each targeting a different physiological adaptation. In rowing, the most accurate method uses Heart Rate Reserve (the Karvonen method): Zone HR = RestingHR + (MaxHR - RestingHR) × target%. Zone 1 (Recovery, <60% HRR): Active recovery, very easy. Zone 2 (Aerobic, 60-70% HRR): UT2 base building — where most training should happen. Zone 3 (Tempo, 70-80% HRR): UT1, moderate aerobic work. Zone 4 (Threshold, 80-90% HRR): Anaerobic threshold, race preparation. Zone 5 (Max, 90%+ HRR): VO2 max, race intensity. Most rowing training should occur in Zones 1-2, with only strategic doses of Zone 4-5 work. Heart rate is more reliable than split time alone because the same split at different HR levels represents very different physiological demands.
How Watta Uses Heart Rate Zones (Rowing)
Watta calculates personalized five-zone heart rate bands using the Karvonen method based on your resting and max heart rate. Every workout shows time in each zone, and the Cardiac Load component (40% of Effort Score) uses HR Reserve intensity with non-linear scaling to accurately reflect physiological strain.
Further Reading
- Concept2 Training Resources — Official training guides and workout plans from Concept2.
- Concept2 RowErg Specifications — Technical specifications and performance monitor details.
- World Rowing — The international governing body for the sport of rowing.
Frequently Asked Questions
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