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Max Heart Rate and Training Zones at Age 50

Calculate your five heart rate training zones from age using the Tanaka formula, with optional Karvonen (heart rate reserve) targets from your resting pulse.

If you enter your resting pulse, each zone also gets a Karvonen (heart rate reserve) range — usually more accurate for trained people.

Formula-based estimates for healthy adults — general fitness information, not medical advice. Consult a doctor before intense training.

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Reading age and resting heart rate
Estimating maximum heart rate
Building the five training zones

Result

This page opens the heart rate zone calculator with age 50 prefilled and the result already computed — the zone table below the form is generated live by the same tool.

At age 50 the formulas start to disagree: Tanaka (208 − 0.7 × 50) estimates 173 bpm while the classic 220 − age gives 170 bpm. Research favors Tanaka in older adults, where the classic rule tends to underestimate — one reason this calculator leads with it. The five zones from the Tanaka number span roughly 87 to 173 bpm.

Both are still population averages with real individual spread, so treat the bands as starting points. Adding your resting heart rate switches on Karvonen ranges, which usually track a trained fifty-year-old better than plain percentages.

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Accepted Formats & Rules

  • Five color-coded zones: recovery, easy, aerobic, threshold and maximum (50–100% of max HR).
  • Tanaka max HR as the primary estimate, classic 220 − age shown for reference.
  • Optional resting heart rate input adds Karvonen (HRR) ranges to every zone.
  • Copyable text summary of max HR and all five zones.

Key Benefits

✓ Two estimates, honestly labeled: the Tanaka formula (208 − 0.7 × age) as the primary number and the classic 220 − age alongside, with a clear note on the error both carry.
✓ Karvonen targets when you know your resting pulse: zones computed from heart rate reserve sit next to the plain %HRmax bands for direct comparison.
✓ Everything is calculated locally in your browser — age and resting heart rate are never sent anywhere.

Use Cases

  • • Find your zone 2 range for base-building runs and rides — the easy, conversational intensity endurance coaches prescribe most hours at.
  • • Set honest heart rate alerts on a sports watch using the Tanaka estimate instead of the folklore 220 − age rule.
  • • Enter your resting pulse to get Karvonen (heart rate reserve) targets — usually a better fit for trained athletes than plain %HRmax.