Physiotherapy
Target Heart Rate & Training Zones (Karvonen HRR Formula)
Calculates heart rate reserve (HRR) and 5 clinical exercise training zones (Fat Burn, Aerobic, Anaerobic).
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Parameters
Target Heart Rate & Training Zones (Karvonen HRR Formula) Result
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Formula
Target HR = Resting HR + (% Intensity × HRR)
Heart Rate Reserve (HRR) = Max HR - Resting HR
Estimated Max HR = 207 - (0.7 × Age)Clinical Pearls
Provides the most physiologically accurate exercise target zones by accounting for individual baseline resting autonomic tone.
Limitations
Atrial fibrillation, pacemaker dependence, and chronotropic incompetence distort heart rate reserve calculations.