Estimate moderate and vigorous training ranges from age and resting heart rate.
Educational estimate only. This calculator does not diagnose any condition, provide medical advice, prescribe treatment, or replace a doctor or qualified healthcare professional.
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Your result
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How this calculator works
The estimate uses 220 minus age and applies 50–70% and 70–85% of heart-rate reserve above resting rate.
Change one assumption at a time to see which inputs have the greatest effect on the estimate.
Worked example
Zones are approximate ranges, not limits or prescriptions.
Limitations
Educational estimate only. This calculator does not diagnose any condition, provide medical advice, prescribe treatment, or replace a doctor or qualified healthcare professional. Medicines, heart conditions, fitness, heat, illness, and measurement error can change safe exercise intensity. Stop and seek care for concerning symptoms.
Review this educational estimate against current quotes, official information, and your own budget before making a financial decision.
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