Vital signs
Heart Rate
LOINC 8867-4 · bpm
Ranges
Reference range: 60–100 bpm
What it is
Heart rate is the number of times your heart beats per minute. It changes constantly with activity, emotion, temperature and health.
Why it matters
It is a basic vital sign that reflects how hard your heart is working at a given moment.
What high values can mean
A higher value is normal during exercise or stress but, at rest, can reflect caffeine, illness, dehydration or a heart issue.
What low values can mean
A lower value can be a sign of fitness, but a very low rate with symptoms like dizziness can matter.
How to improve it
Regular aerobic exercise, good sleep, hydration and managing stress support a healthy heart rate.
Food & lifestyle
Limiting caffeine and alcohol, staying hydrated and regular exercise support a steady heart rate.
Preparing for the test
Measure at rest for a resting reading; activity, caffeine and stress raise it temporarily.
When to talk to a doctor
Discuss a persistently fast or slow resting heart rate with a doctor, especially with symptoms.
Related markers
Sources
- American Heart Association
- MedlinePlus (NIH)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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