Normal Heart Rate: Resting Ranges for Adults, Children and Athletes — and When a Number Is Not Normal

Key Takeaways: Normal Heart Rate

The familiar 60–100 bpm range for a normal resting heart rate has been described as established by consensus rather than by a systematic study, and some researchers have argued that 50–90 bpm fits healthy people better.
In 92,457 adults tracked with a wrist-worn device, the average resting heart rate was 65.5 bpm, but individual averages ranged from 39.7 to 108.6 bpm.
Age, sex, body mass index and sleep duration together explained no more than 10% of the differences in resting heart rate between people, so changes from a person’s usual level may add useful information to population cut-offs.
Women had a higher resting heart rate than men in every age bracket in that cohort.
A normal heart rate in children depends heavily on age: the median rises from 127 bpm at birth to 145 bpm at about one month, then falls to 113 bpm by age two.
In highly trained athletes, sinus bradycardia is present in up to 80%, and rates of 30 bpm or more are considered normal when there are no symptoms such as fatigue, dizziness or fainting.
Maximum heart rate is a separate concept: it falls with age, and in a large meta-analysis the age relationship did not differ between men and women or with habitual physical activity.
A higher resting heart rate is associated with higher mortality in population studies, but this is an association, not proof that the number itself causes harm.
In my clinical experience, smart-ring readings in the 40s or even the 30s at night can alarm patients but often turn out to be ordinary, especially in athletic people; a very low heart rate may still be worth assessing once, particularly in older patients.
In my view, a resting heart rate that stays in the 80s is worth a closer look, and stress or a somatic cause such as hyperthyroidism may lie behind it.
Context matters: whether the rate is usual for the person, whether the rhythm is regular, and whether there are symptoms such as shortness of breath or chest discomfort, which may warrant assessment regardless of age.

Introduction: Why “Normal Heart Rate” Is Harder to Define Than It Looks

Heart rate is one of the simplest measurements in medicine, and many wearable devices now report it continuously. That has made a basic question surprisingly common: what is a normal heart rate, and is my number inside it?

The textbook answer for adults at rest is 60 to 100 beats per minute (bpm).[1] Yet the history of that range, large wearable datasets and athlete-specific guidelines all suggest that “normal” is wider and more individual than a single range implies. A large population cohort found that individual resting averages differed between people by nearly 70 bpm, while each person’s own resting heart rate stayed fairly stable over time.[2]

This article covers what the research says about normal heart rate at rest in adults, children and athletes, how heart rate behaves during and after exercise, what pushes it up or down, and why the number is linked to long-term health.

Heart rate comes up from time to time in my own practice, and from a clinical perspective it is an essential part of a patient’s overall assessment. Many patients ask what a normal heart rate actually is, and the honest answer is that it varies considerably from person to person. Today the question often arises because patients use smart rings such as the Oura Ring. Heart rate naturally falls during the night, and some patients have seen readings in the 30s, which can understandably be alarming. In my clinical experience, most of these situations turn out to be fairly ordinary, although, depending on the patient, a very low heart rate may be worth assessing at least once.

What Is a Normal Resting Heart Rate in Adults?

Where the 60–100 bpm range came from

The limits of 60 and 100 bpm for normal sinus rhythm have been accepted for decades and trace back to long-established New York Heart Association recommendations. In a 1992 paper, Spodick and colleagues noted that a search of the earlier literature found no investigation that had systematically defined sinus bradycardia and tachycardia for clinical use, and they argued from clinical experience that both traditional limits were set too high.[1] In practice, they suggested, a resting rate of 90–100 bpm should already raise suspicion, while an asymptomatic person with a rate of 50–60 bpm need not be a cause for concern.[1]

In a 1996 summary, Spodick described these limits as established by consensus and never formally examined, and wrote that the question had been investigated formally in 500 normal individuals, with results consistent with data from the Framingham Study cohort of 5,000 people and a cohort of more than 18,000 normal persons. On that basis, he proposed rounded limits of 50 to 90 bpm as the appropriate range for normal sinus rhythm.[3]

Current US guidance also uses a lower threshold. The 2018 ACC/AHA/HRS bradycardia guideline uses a sinus rate below 50 bpm, rather than below 60 bpm, in its definition of sinus bradycardia as one form of sinus node dysfunction. This definition appears under sinus node dysfunction with accompanying symptoms, so it is not a general lower limit of normal for all adults.[4]

What large wearable datasets show

One of the largest datasets on everyday resting heart rate comes from a retrospective study of 92,457 US adults who consistently wore a wrist-worn heart rate tracker (at least 20 hours a day, at least two days a week, for at least 35 weeks), with daily values available for a median of 320 days.[2] The mean resting heart rate was 65.5 ± 7.7 bpm, and individual averages ranged from 39.7 to 108.6 bpm. Ninety-five percent of men had an average between 50 and 80 bpm, compared with 53 to 82 bpm in women.[2]

Two findings from this cohort matter for anyone checking their own number. First, age, sex, body mass index and average sleep duration together accounted for no more than 10% of the variability between individuals.[2] Second, for most participants the typical range of resting heart rate within a single week was only about 3 bpm, although about 20% had at least one week in which it fluctuated by 10 bpm or more.[2] In other words, a normal heart rate is partly a personal baseline, and a clear change from that baseline may add information that a population range alone does not capture.

In my practice, a fairly typical heart rate measured during a blood pressure check is around 60 bpm, and sometimes around 70 bpm if the patient is nervous about the appointment. Some patients naturally have a higher resting heart rate, in the 70s and occasionally in the 80s. In my clinical experience, these patients often have something that increases sympathetic activity, such as stress. For me, the point where I start to look more closely is perhaps around 80 bpm: when a resting heart rate stays in the 80s, in my experience there is often something in the background raising it. A very high resting heart rate is something a clinician may no longer be able to call normal.

Normal Heart Rate by Age and Sex

In the same wearable cohort, women had a significantly higher resting heart rate than men in all age brackets.[2] Average resting heart rate rose until roughly 50 years of age and then began to decline. The relationship with body mass index was U-shaped, with the lowest resting heart rate at a BMI of 21 in women and 23 in men, and the lowest values were seen in people who slept an average of 7–7.5 hours per night.[2]

Resting heart rate also changed with the seasons. The population average varied by 2 bpm over the year, peaking in the first week of January and reaching its lowest point at the end of July.[2] Women of childbearing age showed greater variability in their daily resting heart rate over time than men of the same age, a difference that had disappeared by age 50.[2]

These are associations from people who chose to wear a fitness device, and the authors acknowledge that the cohort is unlikely to represent the full diversity of the US population.[2]

Normal Heart Rate in Children

Children’s heart rates are higher than adults’ and change rapidly in the first years of life. A systematic review in The Lancet combined 69 studies, 59 of which provided heart rate data on 143,346 healthy children from birth to 18 years.[5] Heart rate declined with age overall, but with a small early peak: the median rose from 127 bpm at birth to a maximum of 145 bpm at about one month, before falling to 113 bpm by two years of age.[5]

The review also showed that widely used reference ranges for normal heart rate in children did not match the data well. At ten years of age, the Advanced Paediatric Life Support heart rate cut-off classified approximately 40% of normal children as abnormal, and for children aged 2 to 10 years, the Pediatric Advanced Life Support upper limit of 140 bpm lay above the 99th centile for most of that age range.[5] The authors noted that heart rate can be raised by fever or anxiety and that manual counting may underestimate the true rate.[5]

Normal Heart Rate in Athletes

Athletes are where the standard adult range for a normal heart rate breaks down most clearly. According to the international consensus criteria for ECG interpretation in athletes, sinus bradycardia (a rate below 60 bpm) is present in up to 80% of highly trained athletes, and it is particularly common in endurance athletes because of increased vagal tone and possible structural remodelling of the atria.[6] In the absence of symptoms such as fatigue, dizziness or syncope, heart rates of 30 bpm or more are considered normal in highly trained athletes, and the slow rate should resolve once physical activity begins.[6]

The same document describes resting rates commonly between 40 and 60 bpm or even lower as a hallmark of athletic conditioning. A resting rate of 30 bpm or lower, or a pause of 3 seconds or more, may still be normal in a well-trained athlete but should prompt further evaluation, beginning with whether the heart rate rises appropriately during light activity.[6] These criteria were developed for athletes aged 12–35, and training-related ECG changes are more common in people training intensively for at least 4–8 hours per week.[6]

The bradycardia guideline also lists athletic training in its table of common potentially reversible or treatable causes of sinus node dysfunction, and it advises against permanent pacing in people without symptoms whose sinus bradycardia results from physiologically elevated parasympathetic tone.[4]

In my clinical experience, athletic patients often have a fairly low resting heart rate, easily around 50 bpm and sometimes even in the 40s, particularly at night. They may have a larger heart and a larger stroke volume, which may help explain the slower rate.

How resting heart rate behaves during heavy training and overreaching is discussed in resting heart rate changes in overtrained athletes and heart rate variability in athletes.

Normal Heart Rate During and After Exercise

Maximum heart rate

During exercise, heart rate rises towards a person’s maximum heart rate, which in healthy adults is predicted largely by age. A meta-analysis of 351 studies involving 18,712 subjects produced the equation 208 − 0.7 × age, and a laboratory study of 514 healthy adults gave a virtually identical result (209 − 0.7 × age).[7] The relationship did not differ between men and women and was not influenced by habitual physical activity.[7]

Compared with this equation, the traditional 220 − age formula overestimates maximum heart rate in young adults, matches it around age 40 and increasingly underestimates it after that, by about 10 bpm at age 70.[7] Because individual values vary around the line with a standard deviation of about 10 bpm, the authors recommend direct measurement whenever possible.[7] The practical meaning of this number is covered in max heart rate and age.

Heart rate recovery

How quickly heart rate falls after exercise is also informative. In a study that followed 2,428 consecutive adults without a history of heart failure or coronary revascularization for six years, an abnormal heart rate recovery was defined as a fall of 12 bpm or less from peak exercise to one minute after stopping.[8] A total of 639 participants (26%) had an abnormal value, and there were 213 deaths. A low heart rate recovery was associated with a relative risk of death of 4.0 in univariate analysis and 2.0 after adjustment for age, sex, medications, myocardial perfusion findings, cardiac risk factors, resting heart rate, the change in heart rate during exercise and workload.[8]

The 12 bpm threshold was studied in a formal exercise-testing protocol; the study did not examine heart rate recovery measured by a watch after an ordinary training session.

What Moves Heart Rate Outside the Normal Range?

Factors that raise heart rate

Fever can temporarily raise heart rate. In a study of 27 young men with an acute febrile infection, the mean heart rate was 84.0 bpm during the febrile period and 66.5 bpm after recovery. On average, heart rate rose by 8.5 bpm for each 1 °C increase in temperature, and it remained high even during sleep.[9] Exercise during fever is discussed in fever and training.

For athletes, the consensus criteria state that a repeat ECG should be considered after a period of rest if the resting sinus rate is above 120 bpm, because recent exercise or anxiety may be responsible. If the rate remains high, possible causes include fever, infection, dehydration, stimulant use, anaemia, hyperthyroidism and, rarely, underlying cardiac or pulmonary disease.[6] Hyperthyroidism is covered in the article on Graves’ disease.

Psychological stress can also be behind a raised heart rate. In my clinical experience, heart rate rises with stress in many patients, and in those who are chronically stressed it may stay elevated almost continuously. Some patients become alarmed when they notice that their heart rate is high, and some go on to have panic attacks; many worry that they might be having a heart attack. In these situations, the heart rate and the sympathetic nervous system can, in a sense, race out of control together. These patients may also experience shortness of breath and sometimes tingling of the lips.

A persistently raised resting heart rate can also have a somatic explanation. In my practice, a persistently elevated resting heart rate is usually a reason for me to check thyroid function at least once. I have seen patients who had a resting heart rate above 80 bpm for a long time, and in whom hyperthyroidism was eventually found to be the underlying cause. Some of them may have had a fairly high heart rate already when they were younger, with a further rise more recently, which can sometimes blur the diagnostic picture.

Factors that lower heart rate

The bradycardia guideline lists several common potentially reversible or treatable causes of sinus node dysfunction, including athletic training, hypothyroidism, sleep apnea, electrolyte abnormalities, hypothermia and medicines such as beta blockers, non-dihydropyridine calcium channel blockers and digoxin.[4] Hypothyroidism is discussed in more detail in the article on hypothyroidism.

From a clinical perspective, a very low heart rate can be worth assessing at least once, and much depends on the patient. In a young, otherwise healthy, athletic man without symptoms, it may be entirely physiological. In older patients, I would usually check an ECG at least once to look for sick sinus syndrome, another arrhythmia such as slow atrial fibrillation, or any other abnormality.

Heart rate also falls during sleep. The guideline notes that nocturnal bradycardias are relatively common, that their presence should prompt consideration of screening for sleep apnea, and that nocturnal bradycardia is not in itself an indication for a pacemaker.[4]

Why a Normal Heart Rate Matters for Long-Term Health

Resting heart rate is linked to long-term outcomes. A meta-analysis of 46 prospective cohort studies from the general population included 1,246,203 participants and 78,349 deaths in its all-cause mortality analysis.[10] Each 10 bpm increase in resting heart rate was associated with a relative risk of 1.09 for all-cause mortality and 1.08 for cardiovascular mortality. Compared with the lowest heart rate category, people with a resting heart rate of 60–80 bpm had a relative risk of 1.12 for all-cause mortality, and those above 80 bpm had a relative risk of 1.45.[10]

These figures need careful reading. The authors detected substantial heterogeneity and publication bias, and after correcting for publication bias the all-cause relative risk per 10 bpm fell to 1.04.[10] They also noted that, at the time of their analysis, resting heart rate had not been recommended in American and European cardiovascular risk-assessment guidelines, possibly because a higher heart rate tends to occur together with traditional risk factors, and that treatment lowering heart rate would need to improve outcomes before it could be called a true risk factor.[10]

In practice, a resting heart rate within the normal range may be best seen as one piece of information alongside blood pressure, fitness and other risk factors. Blood pressure ranges are covered separately in what is normal blood pressure.

When a Heart Rate Is Not Normal

Taken together, the research suggests that judging a normal heart rate depends less on where it falls relative to 60 or 100 bpm and more on its context. Situations described in the sources above that may deserve a closer look include:

A resting rate that stays clearly raised without an obvious explanation such as exercise, anxiety or fever, particularly above 120 bpm in an athlete.[6]
A slow heart rate accompanied by symptoms such as fatigue, dizziness or fainting, or a heart rate that does not rise appropriately with activity.[6]
A sustained change from a person’s own stable baseline, given that most people’s weekly fluctuation is small, although the study did not set a threshold for how large a change matters clinically.[2]
Low heart rates during sleep together with possible signs of sleep apnea.[4]

In practice, judging whether a heart rate is normal comes down to the patient’s overall clinical condition. Useful questions include whether this is the patient’s usual heart rate, whether it has always been at this level, whether the rhythm is regular, and whether there are any symptoms. If a raised heart rate is accompanied by symptoms such as shortness of breath or chest discomfort, the explanation may be something other than a normal variation, and in my view that may warrant medical assessment.

In the emergency department, when a patient presents with malaise, chest pain or shortness of breath together with a raised heart rate, pulmonary embolism is, depending on the patient’s profile, one of the first possibilities that comes to my mind. These patients usually have other symptoms as well, but in my experience a pulmonary embolism can sometimes cause surprisingly few symptoms, which can make the diagnosis more difficult.

Whether the heart rate is regular also matters. An irregular rhythm may point, for example, to atrial fibrillation, which I occasionally see even in young patients, so in my view it is not something to dismiss on the basis of age alone. On the other hand, some patients simply have frequent extra beats that make the pulse irregular; in my experience, on auscultation the underlying rhythm is usually regular, with occasional extra beats in between. Some young patients also have supraventricular tachycardia. In the patients I have seen, the heart rate has usually been very high, often well over 100 bpm and in some cases approaching 200 bpm. In my clinical experience it usually causes noticeable symptoms, although symptoms vary and some patients have surprisingly few.

Conclusion: Normal Heart Rate

The 60–100 bpm range for a normal heart rate is a useful convention, but it has been described as established by consensus rather than by a systematic study, and the 2018 US bradycardia guideline uses a sinus rate below 50 bpm in its definition of sinus bradycardia, in the context of sinus node dysfunction.[1][3][4] In everyday wearable data, individual averages spanned roughly 40 to 109 bpm, and the usual demographic factors explained little of that spread.[2]

Children follow their own age-specific curve, and in highly trained athletes a resting rate well below 60 bpm is usually a normal adaptation when there are no symptoms.[5][6] A higher resting heart rate is associated with higher mortality, but the strength of that link is uncertain and it does not establish causation.[10]

In my clinical practice, heart rate is one part of a broader assessment rather than a verdict on its own. Low night-time readings from a smart ring often turn out to be ordinary, particularly in athletic people, although a very low rate may be worth assessing once, and in older patients I would usually look at an ECG. When a resting heart rate stays in the 80s, in my experience something such as stress or a condition like hyperthyroidism may be behind it. An irregular rhythm, or a raised heart rate with symptoms such as shortness of breath or chest discomfort, may warrant medical assessment regardless of age.

The most useful way to interpret a normal heart rate reading is in context: a person’s own baseline, their age and training status, how they feel, and what else might be raising or lowering the number.

Normal Heart Rate: Resting Ranges for Adults, Children and Athletes — and When a Number Is Not Normal

Table of Contents

Key Takeaways: Normal Heart Rate

Introduction: Why “Normal Heart Rate” Is Harder to Define Than It Looks