Heart Rate Zone Calculator
Calculate your heart rate training zones using the Karvonen method for optimal workouts.
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Karvonen Heart Rate Zones
The Karvonen method uses your heart rate reserve (Max HR - Resting HR) to calculate personalized training zones. Zone 2 is ideal for fat burning and endurance. Zone 4-5 improves speed and anaerobic capacity. Max HR is estimated as 220 minus age.