Normal resting heart rate by age: table and what it means when it changes

You take your pulse at the pharmacy or see it on your watch, it reads 78, and the question comes on its own: what is a normal resting pulse for my age? The short answer is a little disappointing: in adults the range is wide and hardly moves with the years. The useful answer is a different one. Resting heart rate, the formal name for the resting pulse, is one of the few health data points you can measure every day at no cost, and what it says about you is not in the table but in how it compares with your own usual level and in when it changes.

First, what does not allow calm reading. If your pulse changed suddenly and comes with chest pain, shortness of breath, fainting or feeling that you are about to faint, or if you have palpitations that do not go away, do not measure anything else: seek medical care now.^[1][3]

What a normal resting pulse is

The resting pulse is the number of times the heart beats per minute while you are sitting or lying down, calm. For adults, the reference used by the American Heart Association and the US National Library of Medicine is 60 to 100 beats per minute.^[1][2] Below 60 is called bradycardia and above 100 tachycardia, but those words describe a number, not a problem: many healthy people live outside the range without it meaning anything.^[1]

What does change with age is the range in childhood. A newborn can have 150 beats per minute at rest and be perfectly fine; from age 10 the range is already the adult one and stays the same into old age.^[2] Highly trained people, especially in endurance sports, usually sit lower: 40 to 60 beats per minute is common in athletes,^[2] and in elite athletes figures down to 30 are considered normal if there are no symptoms.^[5] The table below is the MedlinePlus one:^[2]

Your usual level matters more than the table

Two reasons. First: the resting pulse is fairly stable within the same person, so a deviation from your own is informative even if it stays within 60 to 100. In a study with watches during and after a respiratory infection, the resting pulse of participants first dipped slightly and then stayed above their own baseline, on average until 79 days after symptom onset; in 13.7 % of people it stayed more than 5 beats per minute above their level for over 133 days.^[10] Nobody would have seen that in the table: most stayed between 60 and 100.

The same happens with smaller things. Stress and anxiety, alcohol, lack of sleep and strenuous exercise speed up the heart,^[3] and heat and fever raise it too.^[1] A resting pulse that wakes up 5 or more beats above your usual and stays there for several days is usually telling one of those stories: an infection starting, a week of poor sleep, several days of alcohol, a trip in the heat, or more training than the body manages to recover from. It is not a diagnosis; it is a signal that it is worth asking what happened.

The second reason is long-term. In population follow-ups, a resting pulse that stays high for years is associated with higher mortality. In the Copenhagen Male Study, with almost 2,800 men followed for 16 years, risk rose by about 16 % for every 10 extra beats per minute of resting pulse, and men above 90 had close to three times the risk of those at 50 or below, independently of their physical fitness.^[4] It is an association, not a proven cause. It means that a pulse that lives at 90 deserves a conversation with your doctor, even if the table says “normal”.

What raises the resting pulse

If your pulse is high and you are not sure why, these are the causes most worth checking, because almost all of them can be measured or asked about:

• Fever and infections. A high body temperature speeds up the heart,^[1] and a fast pulse can be the first sign of an infection or of dehydration.^[2]
• Iron-deficiency anaemia. With less haemoglobin to carry oxygen, the heart compensates by beating more often; palpitations are one of its symptoms.^[3] If you are also tired and pale, read what a complete blood count includes.
• Overactive thyroid (hyperthyroidism). A fast or irregular heart, weight loss with normal or increased appetite, feeling hot and sweating, anxiety, hand tremor and poor sleep go together; it is checked with TSH, T4 and T3.^[6]
• Caffeine, nicotine and alcohol. All three speed up the heart and cause palpitations;^[3] energy drinks add caffeine in high doses.
• Decongestants. Pseudoephedrine, common in cold medicines, can cause a fast, pounding or irregular heartbeat, and people with high blood pressure or thyroid or heart problems should check before taking it.^[8]
• Anxiety, stress and little sleep. The pulse rises with stress, anxiety and lack of sleep,^[3] and also with intense emotions, including the good ones.^[1]
• Low fitness and excess weight. A trained heart beats fewer times to move the same blood;^[1] months without moving do the opposite, and people with obesity tend to have a higher pulse.^[1]
• Pregnancy and menopause. Palpitations are common in pregnancy and around the menopause.^[3]

What lowers the resting pulse

A low pulse is less worrying than it seems, as long as it does not come with symptoms.

• Training. It is the most common cause. Bradycardia appears in up to 80 % of highly trained athletes and is considered normal if there is no tiredness, dizziness or fainting.^[5]
• Medicines. Beta blockers, calcium channel blockers and other medicines slow the heart;^[1] if you take them, your usual level will be lower and that is expected.
• Underactive thyroid (hypothyroidism). A slow pulse goes with tiredness, weight gain and trouble tolerating cold.^[7]
• Sleep. At night the heart slows down, which is why the pulse your watch reports during sleep is usually lower than the one you take by hand in the morning. Always compare the same type of measurement.

When a low pulse does call for a check: if it drops below 30 at rest, if there are long pauses between beats, or if it comes with dizziness, unusual tiredness or fainting, even in a trained person.^[5]

How to measure it: watch and by hand

Watches and bands measure the pulse with an optical sensor on the wrist: a light that detects the change in blood volume with each beat. The “resting heart rate” figure they show is usually calculated overnight or in the quiet moments of the day, which is why it is useful as a trend: same method, same time, every day. The single reading can fail with a cold wrist, a loose watch or movement; the trend over weeks, much less so.

By hand works just as well and costs nothing:

1. On waking, before getting up and before coffee, stay lying or sitting for a few minutes. For a resting measurement you should have been calm for at least 10 minutes.^[2]
2. Place your index and middle fingers on the inner side of the opposite wrist, below the base of the thumb, until you feel the beat.^[2]
3. Count the beats for 30 seconds and multiply by 2, or count the full minute.^[2]
4. Write down the number with the date and, next to it, how you slept. With two weeks of records you already know your usual level.

Heart rate variability, briefly

Many watches also show heart rate variability (HRV): the fluctuation in the time between one beat and the next. A healthy heart is not a metronome; that variation reflects how the nervous system regulates the heart, blood pressure and breathing.^[9] In general, higher HRV goes with better fitness and better adaptability, and it falls with age, with declining health and with stress or anxiety.^[9]

The trap is in comparing. HRV depends on age, sex, heart rate, breathing, posture, time of day and how long the measurement lasts: readings of different lengths are not comparable with each other, and those of a few minutes are not equivalent to 24-hour ones.^[9] That is why your 45 against your friend’s 70 says nothing, and your 45 today against your usual 60 does: HRV, like the resting pulse, is only useful compared with yourself, measured the same way every night.

Warning signs: when you do not log, you consult

Most changes in pulse are explained by context and resolve on their own. These are not to be waited out:^[1][3]

• A pulse that changes suddenly and comes with chest pain or shortness of breath.
• Fainting or feeling that you are about to faint, with a pulse that is very fast or very slow for you.
• Palpitations that do not go away, or a clearly irregular pulse you had not felt before.
• A resting pulse above 100 on several calm measurements, with no fever, caffeine or other cause to explain it.
• A pulse below 60, or well below your level, together with dizziness, weakness or new tiredness.

What to record and what to bring to the appointment

An isolated pulse says little. A three- or four-week log, with the context alongside, changes the conversation with your doctor:

• Resting pulse every morning, by hand or the one your watch reports, always with the same method.
• Real sleep hours and whether you woke up rested.
• Alcohol and caffeine: how much and at what time, including energy drinks and sodas.
• Illness: fever, cold, sore throat, and how many days the pulse took to return to your usual.
• Training: days, intensity and whether the next morning’s pulse was high.
• New medicines, including over-the-counter cold medicines, thyroid medicines and blood pressure medicines.
• Symptoms: palpitations, dizziness, shortness of breath on stairs, feeling unusually hot or cold, weight changes.

With that in hand, your doctor decides whether anything else is needed: a thyroid check (TSH) if the picture points there,^[6][7] a complete blood count if there are palpitations with tiredness and pallor, because iron-deficiency anaemia is one of the known causes,^[3] or an electrocardiogram if the pulse is irregular. If your high pulse comes with months of tiredness, the guide on being tired all the time sorts out the causes. And if you measure your blood pressure at home, write them down together: blood pressure is measured with the same resting rules.