Heart rate 237 on an adult - what does it mean?
A heart rate of 237 bpm is above any expected maximum heart rate, even during the hardest exercise. Check the reading first (devices can miscount); if it is real, it needs urgent medical care.
Where 237 bpm sits on the adult scale
- Very low
- Low (bradycardia)
- Slightly low
- Normal
- Elevated (tachycardia)
- High
- Very high
What a resting pulse of 237 means
At rest, a sudden racing heartbeat of 237 bpm is usually not ordinary sinus rhythm. Typical causes are supraventricular tachycardia (SVT), atrial flutter or fibrillation, and — less often but more dangerous — ventricular tachycardia.
Also double-check the reading: wrist devices can lock onto your movement cadence during exercise and report it as heart rate.
Ranges apply to adults and children aged 10 and older, measured at rest (American Heart Association). By the numbers: at 237 bpm the heart beats about every 0.25 seconds — roughly 341,280 beats a day.
237 bpm during exercise
This table compares 237 bpm with the common estimate of maximum heart rate (220 minus age). Individual maximums can differ by 10–20 bpm.
237 bpm is above the estimated maximum heart rate at every age in the table. It is above any expected maximum, even during the hardest exercise.
| Age | Est. max (220 − age) | 237 bpm is | Training zone |
|---|---|---|---|
| 20 | 200 bpm | 119% of max | above estimated max |
| 30 | 190 bpm | 125% of max | above estimated max |
| 40 | 180 bpm | 132% of max | above estimated max |
| 50 | 170 bpm | 139% of max | above estimated max |
| 60 | 160 bpm | 148% of max | above estimated max |
| 70 | 150 bpm | 158% of max | above estimated max |
How the zones work: Heart Rate Zones: The 5 Training Zones by Age.
For a reliable resting value, sit quietly for five minutes first and average a few mornings: Resting Heart Rate: What It Says About Your Health. You can also measure by tapping along on the start page.
Check another reading
Nearby values
Measured on a child instead? See heart rate 237 in a child.
Sources: American Heart Association: All About Heart Rate · MedlinePlus: Pulse · ACSM position stand on exercise intensity (2011)
This page explains a single reading in general terms. It is not a diagnosis. Heart rate alone cannot tell whether the rhythm is regular or whether the heart is healthy — if you are worried, talk to a doctor.