Heart rate 84 on an adult - what does it mean?

Where 84 bpm sits on the adult scale

What a resting pulse of 84 means

That is still normal. Studies have linked a resting heart rate that stays in the upper part of the range (above about 80 bpm) with a somewhat higher long-term cardiovascular risk, so if yours is consistently here, regular aerobic exercise, sleep and stress management are the usual first steps.

Your resting rate varies by several beats from day to day. Measure at the same time — ideally in the morning before getting up — and look at the average over a week rather than a single number.

Ranges apply to adults and children aged 10 and older, measured at rest (American Heart Association). By the numbers: at 84 bpm the heart beats about every 0.71 seconds — roughly 120,960 beats a day.

Low iron and a pulse of 84

Red blood cells carry oxygen from the lungs to every tissue, using a protein called hemoglobin that needs iron to work. When there are too few red cells or too little hemoglobin, a condition called anemia, each heartbeat delivers less oxygen than before. The body compensates in the most direct way it can: the heart beats faster to move the available blood around more often.

Mild anemia may change the resting pulse very little. As it becomes more marked, a resting rate in the 80s or 90s is common, and the pulse can jump unusually high with light effort such as climbing one flight of stairs. A resting 84 on its own is normal, but if it is higher than your usual value and you also feel unusually tired, anemia is worth ruling out.

Clues that point to iron deficiency

• tiredness that does not improve with rest
• getting out of breath more easily than before
• pale skin, pale inner eyelids or pale nail beds
• cold hands and feet
• headaches or difficulty concentrating
• brittle or spoon-shaped nails
• a strange urge to chew ice, or restless legs at night

Iron deficiency is the most common cause of anemia. It often develops slowly, so people get used to feeling below par. Typical reasons include heavy menstrual periods, pregnancy, a diet low in iron, frequent blood donation and slow, hidden blood loss from the stomach or bowel. In men and in women after menopause, doctors take iron deficiency seriously and usually look for a source of bleeding.

Testing first, then treatment

A complete blood count shows whether hemoglobin is low, and a ferritin test shows how much iron the body has stored. Ferritin can be low long before hemoglobin drops, which is why some people feel better with iron even before they are anemic. Do not start high-dose iron tablets without a test: too much iron is harmful, and tablets can hide a cause that needs to be found.

Once iron levels and hemoglobin recover, the heart no longer needs to make up for the shortfall, and the resting pulse often returns to its previous range over a few weeks to months. Shortness of breath at rest, chest pain or black, tarry stools need urgent medical attention. For an overview of why the heart speeds up or slows down, see the human heart rate.

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.

Nearby values

• 79 bpm
• 80 bpm
• 81 bpm
• 82 bpm
• 83 bpm
• 85 bpm
• 86 bpm
• 87 bpm
• 88 bpm
• 89 bpm

Measured on a child instead? See heart rate 84 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.