For a 50-year-old, the Tanaka formula estimates a maximum heart rate of about 173 bpm. That puts your Zone 2 (easy aerobic) at roughly 104–121 bpm and your Zone 4 (threshold) at 138–156 bpm. Below you will find the full 5-zone table, a formula comparison, and a calculator that personalises the numbers if you enter your resting HR.
| Zone | Name | % HRmax | BPM (age 50) |
|---|---|---|---|
| 1 | Recovery | 50–60% | 87–104 |
| 2 | Endurance | 60–70% | 104–121 |
| 3 | Aerobic | 70–80% | 121–138 |
| 4 | Threshold | 80–90% | 138–156 |
| 5 | Maximum | 90–100% | 156–173 |
No single equation is authoritative. The spread below shows why picking a formula matters — the difference between Fox and Nes at your age moves your Zone 2 ceiling by several beats.
| Formula | HRmax at age 50 |
|---|---|
| Fox (220 − age) | 170 |
| Tanaka (208 − 0.7 × age) | 173 |
| Gellish (207 − 0.7 × age) | 172 |
| Nes / HUNT (211 − 0.64 × age) | 179 |
| Gulati (206 − 0.88 × age, women) | 162 |
Typical resting heart rate: 56–72 bpm.
Typical VO2max reference (good/very good): Men 34–39 ml/kg/min (good); women 28–33 ml/kg/min (good). Source: ACSM norms and HUNT Fitness Study.
Why HRmax sits where it does at 50: HRmax has dropped 10–15 bpm from your twenties on average, but the variation between individuals now exceeds the age effect. Some 50-year-olds still hit 190+; others peak at 165.
Two Zone 2 sessions of 45–60 minutes, one long Zone 2 of 75 minutes, one Zone 4 or Zone 5 quality day (4×4 min), and two strength sessions. Full rest day non-negotiable.
Yes — VO2max is one of the strongest predictors of longevity. The Norwegian 4×4 protocol (four 4-minute efforts at 90–95% HRmax, 3 minutes easy between) is well-tolerated and effective. Warm up thoroughly.
For women in peri- or post-menopause, resting HR often rises 3–8 bpm and thermoregulation shifts. Zone boundaries do not change, but perceived effort at a given HR can feel higher. Hydrate aggressively and expect more cardiac drift.
Using the Tanaka formula (208 − 0.7 × age), the estimated maximum heart rate for a 50-year-old is about 173 bpm. Population variability is roughly ±10–12 bpm, so your true HRmax could sit anywhere between 163 and 183 bpm.
Zone 2 for a 50-year-old is approximately 104–121 bpm, which corresponds to 60–70% of an estimated HRmax of 173 bpm. You should be able to hold a full conversation at this intensity.
Zone 4 (lactate threshold) for a 50-year-old is roughly 138–156 bpm — 80–90% of HRmax. At this intensity you can only speak in short phrases.
Enter your resting heart rate into the calculator to apply the Karvonen method, which anchors zones to your heart rate reserve. This is significantly more accurate than %HRmax alone, especially if you are trained or untrained.
Yes — VO2max is one of the strongest predictors of longevity. The Norwegian 4×4 protocol (four 4-minute efforts at 90–95% HRmax, 3 minutes easy between) is well-tolerated and effective. Warm up thoroughly.
For women in peri- or post-menopause, resting HR often rises 3–8 bpm and thermoregulation shifts. Zone boundaries do not change, but perceived effort at a given HR can feel higher. Hydrate aggressively and expect more cardiac drift.
Disclaimer: This calculator is for informational purposes only and does not provide medical advice. Always consult with a healthcare professional before starting any new exercise program.
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