Heart rate 151 on an adult - what does it mean?

151bpm

Very high

A resting heart rate of 151 bpm is very high. During hard exercise it can be expected (see the training table below) — at rest, a pulse this fast needs urgent medical attention.

Where 151 bpm sits on the adult scale

Very low
Low (bradycardia)
Slightly low
Normal
Elevated (tachycardia)
High
Very high

What a resting pulse of 151 means

At rest, a sudden racing heartbeat of 151 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.

What to do: If this is a resting reading, seek urgent medical care now — call 911 (US) or your local emergency number if you have chest pain, shortness of breath, dizziness or feel faint.

Ranges apply to adults and children aged 10 and older, measured at rest (American Heart Association). By the numbers: at 151 bpm the heart beats about every 0.40 seconds — roughly 217,440 beats a day.

151 bpm during exercise

During exercise a higher pulse is expected. This table shows which training zone 151 bpm corresponds to, based on the common estimate of maximum heart rate (220 minus age). Individual maximums can differ by 10–20 bpm.

Age	Est. max (220 − age)	151 bpm is	Training zone
20	200 bpm	76% of max	Zone 3 · Moderate
30	190 bpm	79% of max	Zone 3 · Moderate
40	180 bpm	84% of max	Zone 4 · Hard
50	170 bpm	89% of max	Zone 4 · Hard
60	160 bpm	94% of max	Zone 5 · Maximum
70	150 bpm	101% 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 151 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.