Written by the Nuvirox Research Team
Key points
- 220 minus age was never derived from a large, purpose-built study; it traces to a 1971 review and was later shown to be off by roughly 10 beats per minute or more for many individuals.
- Better-fitting equations exist (Tanaka: 208 − 0.7 × age; Nes: 211 − 0.64 × age), but even they carry a standard error of around 10–11 bpm.
- Use any formula as a starting estimate, cross-check with effort-based tools, and skip heart-rate formulas entirely if you take heart-rate-lowering medication such as beta-blockers.
Short answer: it is accurate on average and frequently wrong for any one person. Across groups of healthy adults, 220 minus age lands in the right neighborhood, but studies that compare it with measured maximum heart rate show individual errors of 10 beats per minute or more are common, and it tends to underestimate maximum heart rate in people over about 40. Newer equations such as Tanaka's 208 − 0.7 × age fit large datasets better, yet none of them can tell you your own number with precision. The fair reading: treat any formula as a rough starting point, not a measurement.
Where did 220 minus age come from?
It was not produced by a large study designed to predict maximum heart rate. It is usually traced to a 1971 review on physical activity and coronary heart disease by Fox, Naughton and Haskell [1], and later researchers describe its origin as unclear [5].
The formula spread because it is easy to remember and to do in your head. It became the default in stress testing, gym charts, and wearables. When Tanaka and colleagues revisited the question in 2001, they pointed out that its validity "has never been established in a sample that included a sufficient number of older adults" [2]. That gap matters, because the error grows as people age.
What is maximum heart rate, and why does it fall with age?
Maximum heart rate is the highest number of beats per minute your heart reaches during an all-out effort. It declines with age in almost everyone, and age alone explains much of the difference between people, but nowhere near all of it.
The number is used to anchor training zones and to judge whether a stress test reached a true maximal effort. If the anchor is off by 12 beats, every zone built on it shifts too.
Same-age adults can differ by 20 beats or more for reasons unrelated to health or fitness, including genetics, body size, and test type (running usually peaks slightly higher than cycling). In a sample of 3,374 mostly athletic Polish adults, age explained only about 19% of the variation in measured maximum heart rate, and adding body composition, fitness, and testing modality improved prediction only slightly [5].
What human studies actually show
Tanaka, Monahan and Seals (2001): the big meta-analysis. The researchers pooled group-average maximum heart rates from 351 studies covering 18,712 healthy adults, then cross-validated the result in their own laboratory with 514 healthy people. The best-fit equation was 208 − 0.7 × age, and the lab sample produced a nearly identical line (209 − 0.7 × age). The relationship did not differ between men and women or with habitual activity level, and the authors concluded that 220 minus age underestimates maximum heart rate in older adults [2].
Gellish and colleagues (2007): following the same people for 25 years. Most earlier equations were built from snapshots of different people at different ages. This retrospective study tracked 132 adults through 908 maximal treadmill tests at a university fitness center between 1978 and 2003. The longitudinal model was 207 − 0.7 × age, close to Tanaka's line and "appreciably different" from 220 minus age [3].
Nes and colleagues (2013): the HUNT Fitness Study. In 3,320 healthy Norwegian men and women who completed direct maximal treadmill tests, the best equation was 211 − 0.64 × age, with a standard error of estimate of 10.8 beats per minute. Sex, activity level, aerobic fitness, and BMI made only minor differences. Older equations underestimated measured maximum heart rate in participants over 30 [4].
Shookster and colleagues (2020): a limiting finding on all of them. This team compared nine published equations, including 220 minus age, Tanaka, Gellish, and Nes, against 99 graded treadmill tests that met a strict maximal-effort criterion. Every equation showed wide limits of agreement with measured values, which the authors summarized as poor agreement. Notably, 220 minus age was the one equation without proportional bias in that sample [6].
Martin and colleagues (2025): fitness does not fix the error. In 230 healthy adults tested between 2019 and 2024, the average bias of seven equations was small (about −3 to +6 bpm), but individual limits of agreement spanned roughly ±18 to 24 beats per minute. Tanaka and Gellish had the lowest average error (mean absolute error around 7.4 bpm), and accounting for aerobic fitness explained very little additional error [7].
Kasiak and colleagues (2023): even in trained athletes. Among 4,043 runners and 1,026 cyclists who completed maximal cardiopulmonary tests, measured and predicted values differed significantly for 9 of 13 equations tested, with root mean square errors of roughly 9 to 10.5 bpm. The authors concluded that prediction can supplement, but not replace, actual testing [8].
How far apart are the formulas at different ages?
At 30 they nearly agree; by 70 they differ by up to 16 beats. The table applies each published equation to the same ages.
| Age | 220 − age | Tanaka | Gellish | Nes |
|---|---|---|---|---|
| 30 | 190 | 187 | 186 | 192 |
| 50 | 170 | 173 | 172 | 179 |
| 70 | 150 | 159 | 158 | 166 |
Each number is a population center; with a standard error near 10 to 11 bpm, a 50-year-old's true maximum could plausibly sit anywhere from the high 150s to around 190.
What 220 minus age won't tell you
It cannot tell you your own ceiling, and it says nothing about your health or fitness. A measured maximum above or below the formula is usually just normal variation, not a sign that something is wrong or right.
It does not apply to people on heart-rate-lowering medication. Beta-blockers blunt the heart rate response to exercise. In a heart failure trial population taking beta-blockers, 220 minus age performed so poorly that its standard error of estimate was 43 beats per minute, and even a purpose-built equation still carried an 18-beat error [9]. In a 2023 cardiac rehabilitation study of patients on beta-blockers, 220 minus age predicted an average maximum of 161 bpm when the measured average was 133 bpm; the authors recommended using measured, not predicted, maximum heart rate to set training targets [10].
It was not built for children. A meta-analysis of youth studies found 220 minus age overestimated maximum heart rate by about 12 bpm, while Tanaka's equation underestimated it by about 3 bpm [11].
See a doctor if you have chest pain, unusual breathlessness, dizziness, or palpitations with exertion, if you have known heart disease, or if you take medication that affects heart rate. A clinician-supervised exercise test, not a formula, is the right way to set limits in those situations.
How should you use a max heart rate formula in practice?
Use one as a first draft, then calibrate it against how exercise actually feels and what your heart does in real sessions.
- Pick a modern equation. If you want a single number, Tanaka (208 − 0.7 × age) is the most widely validated in healthy adults [2], and it consistently ranks among the lowest-error equations in head-to-head comparisons [7].
- Hold the number loosely. Assume your true value could be about 10 beats higher or lower. If easy runs feel hard at the "right" heart rate, the estimate may be off for you.
- Cross-check with effort. Simple tools such as the talk test for exercise intensity do not depend on knowing your maximum at all, and they line up roughly with the intensity where breathing starts to climb.
- Read within-session drift sensibly. On long or hot sessions heart rate rises even at a steady pace. That is cardiac drift, and it can push you into a "higher zone" without any change in effort.
- Get a measured value if it matters. A supervised graded exercise test is the reference method. For healthy, trained people, the peak seen at the end of a hard race is a useful observed value.
- Track trends, not one-off readings. Recovery-based markers such as heart rate recovery after exercise are often more informative about fitness changes over time than your peak.
Frequently asked questions
Why is my max heart rate higher than 220 minus age?
Because the formula describes an average, and individual values commonly sit 10 or more beats above or below it. Large studies also show the formula tends to underestimate maximum heart rate after about age 40 [2][4]. On its own, that is normal variation.
Which max heart rate formula is the most accurate?
No equation is accurate for individuals; all carry errors of roughly 9 to 11 bpm in validation studies [4][7][8]. Among healthy adults, Tanaka and Gellish tend to show the lowest average error [7]. The bigger gain comes from measuring your actual peak or using effort-based zones.
Does being fit change my max heart rate?
Very little. Tanaka's analysis and the HUNT study found activity and fitness levels made only minor differences after accounting for age [2][4].
Can I use 220 minus age if I take beta-blockers?
No. Beta-blockers lower peak heart rate, and studies show the formula can overestimate the true maximum by roughly 30 beats on average in these patients [10]. Ask your clinician about exercise testing or use perceived-exertion targets instead.
Is it dangerous to exceed my age-predicted max?
Reaching a number above the formula's prediction is not itself dangerous for a healthy person, because the formula may simply be wrong for you. What matters is how you feel: chest pain, faintness, or an irregular heartbeat during exercise are reasons to stop and see a doctor, whatever the number says.
From Nuvirox
Why we formulated NAD+ Restore
Heart rate is a window onto how hard your body is working; the energy for that work is produced inside cells, where NAD+ is a central coenzyme in energy metabolism. NAD+ Restore is built around supporting healthy NAD+ levels, with a formula guided by published human research. We are clear about the limits: the link to exercise output is mechanistic, no supplement changes your maximum heart rate, and it is no substitute for consistent, well-dosed training.
It comes with a 60-day money-back guarantee — long enough to actually evaluate it the way the research says you should.
Learn more about NAD+ Restore →The bottom line
220 minus age is a reasonable population average with a shaky origin and an individual error that routinely reaches 10 beats per minute or more, especially in middle-aged and older adults. Modern equations such as Tanaka's fit the data better but share the same basic limitation. Use a formula to sketch your zones, then refine them with measured peaks and effort-based checks like the talk test, and leave formulas aside entirely if medication or heart conditions are in the picture.
References
- Fox SM 3rd, Naughton JP, Haskell WL. Physical activity and the prevention of coronary heart disease. Ann Clin Res. 1971;3(6):404-432. PMID: 4945367.
- Tanaka H, Monahan KD, Seals DR. Age-predicted maximal heart rate revisited. J Am Coll Cardiol. 2001;37(1):153-156. DOI: 10.1016/s0735-1097(00)01054-8. PMID: 11153730.
- Gellish RL, Goslin BR, Olson RE, McDonald A, Russi GD, Moudgil VK. Longitudinal modeling of the relationship between age and maximal heart rate. Med Sci Sports Exerc. 2007;39(5):822-829. DOI: 10.1097/mss.0b013e31803349c6. PMID: 17468581.
- Nes BM, Janszky I, Wisløff U, Støylen A, Karlsen T. Age-predicted maximal heart rate in healthy subjects: The HUNT fitness study. Scand J Med Sci Sports. 2013;23(6):697-704. DOI: 10.1111/j.1600-0838.2012.01445.x. PMID: 22376273.
- Lach J, Wiecha S, Śliż D, et al. HR max prediction based on age, body composition, fitness level, testing modality and sex in physically active population. Front Physiol. 2021;12:695950. DOI: 10.3389/fphys.2021.695950. PMID: 34393819. PMCID: PMC8362801.
- Shookster D, Lindsey B, Cortes N, Martin JR. Accuracy of commonly used age-predicted maximal heart rate equations. Int J Exerc Sci. 2020;13(7):1242-1250. DOI: 10.70252/xfsj6815. PMID: 33042384. PMCID: PMC7523886.
- Martin J, Lindsey B, Gerrity C, Ambegaonkar J. Exploratory analysis of the accuracy of age-based maximal heart rate equations across cardiorespiratory fitness levels. PLoS One. 2025;20(10):e0335842. DOI: 10.1371/journal.pone.0335842. PMID: 41166364. PMCID: PMC12574831.
- Kasiak PS, Wiecha S, Cieśliński I, et al. Validity of the maximal heart rate prediction models among runners and cyclists. J Clin Med. 2023;12(8):2884. DOI: 10.3390/jcm12082884. PMID: 37109218. PMCID: PMC10146295.
- Keteyian SJ, Kitzman D, Zannad F, et al. Predicting maximal HR in heart failure patients on β-blockade therapy. Med Sci Sports Exerc. 2012;44(3):371-376. DOI: 10.1249/mss.0b013e318234316f. PMID: 21900844. PMCID: PMC3755356.
- Keteyian SJ, Steenson K, Grimshaw C, et al. Among patients taking beta-adrenergic blockade therapy, use measured (not predicted) maximal heart rate to calculate a target heart rate for cardiac rehabilitation. J Cardiopulm Rehabil Prev. 2023;43(6):427-432. DOI: 10.1097/hcr.0000000000000806. PMID: 37311037. PMCID: PMC10615658.
- Cicone ZS, Holmes CJ, Fedewa MV, MacDonald HV, Esco MR. Age-based prediction of maximal heart rate in children and adolescents: a systematic review and meta-analysis. Res Q Exerc Sport. 2019;90(3):417-428. DOI: 10.1080/02701367.2019.1615605. PMID: 31157608.
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