Target Heart Rate Calculator for Safe Exercise After 50
Find the heart-rate zone that gets you fitter without pushing past what is safe for your age.
Measure it first thing in the morning before getting up. Adding it lets us use the more accurate Karvonen method.
Why target zones matter after 50
Your maximum heart rate naturally declines with age, so the pace that felt "moderate" at 35 may be maximal effort today. Training within the right zone builds cardiovascular fitness safely — brisk walking, cycling or swimming — without overloading the heart.
How this calculator works
We estimate your maximum heart rate as 220 − age, then show zones from 50% to 85% of that maximum. If you enter a resting heart rate, we switch to the Karvonen method (heart-rate reserve), which personalizes the zones to your current fitness level.
FAQ
I take beta-blockers. Do these numbers apply?
Not reliably — beta-blockers lower heart rate. Use the talk test (effort scale) instead and ask your physician for your target zone.
How often should I be in the moderate zone?
General guidelines suggest about 150 minutes of moderate activity per week — for example, 30 minutes of brisk walking, 5 days a week.
Building a routine? See the guides in Active Fitness Over 50.
Send my heart-rate zones by email
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Tip: in the print dialog, choose “Save as PDF” to keep a copy of your results.
Medical disclaimer: This tool is for informational purposes only; it is not a substitute for professional medical advice, diagnosis, or treatment. Consult your physician before making changes to your diet, exercise routine, or medications.