What is a normal resting heart rate?
For adults, the NHS defines a normal resting heart rate as 60–100 beats per minute (bpm). However, this range is deliberately wide — a rate of 60–80 is generally preferable to 80–100, which, while technically normal, is associated with higher cardiovascular risk.
Well-trained athletes frequently have resting heart rates of 40–60 bpm — a reflection of cardiac efficiency, not pathology. Elite endurance athletes can have RHRs below 40 bpm.
A large Norwegian study found that resting heart rate above 70 bpm was associated with significantly increased all-cause mortality, independent of fitness level. Each 10 bpm increase above 60 was associated with measurably higher cardiovascular risk.
How resting heart rate changes with age
Children
Resting heart rate is highest in infancy (120–160 bpm in newborns) and gradually decreases through childhood as the heart grows larger and more efficient.
Adults
Adult RHR is relatively stable across the decades in healthy individuals, though slight increases are common from middle age as cardiac efficiency declines. The key driver of adult RHR is fitness level, not age — fit older adults typically have lower RHRs than unfit younger ones.
Older adults
Intrinsic heart rate (the rate set by the sinus node pacemaker, independent of neural input) increases slightly with age as the pacemaker cells change. However, this is often offset by increased vagal tone in fit individuals.
What causes a high resting heart rate?
A persistently elevated RHR (above 80–90 bpm at rest) warrants investigation. Common causes include: physical deconditioning, anaemia, thyroid disorders, dehydration, anxiety, medication side effects, and underlying cardiovascular disease.
Regular aerobic exercise is the most effective single intervention for reducing resting heart rate — the heart adapts to training by becoming a more efficient pump, moving more blood per beat (increased stroke volume) and therefore needing to beat less frequently at rest.
Measure first thing in the morning before getting up. Count heartbeats for 60 seconds, or count for 15 seconds and multiply by 4. Track it weekly — trends over time are more meaningful than single readings. Most modern smartwatches provide continuous RHR monitoring.
Resting heart rate reference ranges for adults
| RHR (bpm) | Category | Implication |
|---|---|---|
| Below 40 | Athlete-level bradycardia | Normal for elite athletes; needs investigation in others |
| 40–60 | Excellent | Strong cardiovascular fitness |
| 61–70 | Good | Above-average fitness |
| 71–80 | Average | Typical for healthy adults |
| 81–90 | Elevated | Associated with higher CV risk; consider exercise increase |
| 91–100 | High normal | Worth discussing with GP; investigate causes |
| Above 100 (resting) | Tachycardia | Warrants medical investigation |
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