Apple Watch Resting Heart Rate: Normal & Accurate?

Your resting heart rate is one of the simplest and most useful health numbers your Apple Watch tracks. It reflects your fitness, and day-to-day changes often reveal stress, poor sleep or an illness coming on before you feel it.

This guide explains how Apple Watch measures resting heart rate, how accurate it is, what a normal number looks like and how to read your trend.

This article is for general information and is not medical advice. If you have symptoms or a heart condition, talk to a doctor.

How Apple Watch measures resting heart rate

Apple Watch measures your heart rate in the background throughout the day. From the readings taken while you are still and inactive, it estimates your resting heart rate for the day. You can find it in the Health app on your iPhone under Heart, along with your walking heart rate average.

A few things affect how good that estimate is:

• Wear it all day and night. More quiet moments means more resting readings.
• Wear it snugly, a finger's width above the wrist bone. A loose watch misses beats.
• Keep the sensor clean and dry.

Is Apple Watch resting heart rate accurate?

For most people, yes. In a 2024 validation study, researchers compared Apple Watch Series 9 and Ultra 2 with a Polar H10 chest strap, the reference standard, over two weeks of morning measurements (O'Grady et al., 2024):

• Average bias for resting heart rate: −0.08 bpm. In other words, essentially none.
• Typical error: about 3.7 bpm (around 6%).

That is more than accurate enough for the most useful thing you can do with resting heart rate: watch how it changes over days and weeks.

What is a normal resting heart rate?

According to the American Heart Association, a resting heart rate of 60 to 100 beats per minute is normal for most adults. People who do a lot of endurance exercise often sit lower, and a very fit person's healthy resting heart rate can be as low as about 40 bpm.

Resting heart rate	What it usually means for adults
Below 60 bpm	Common in fit people. Worth checking with a doctor if you also feel dizzy, faint or unusually tired
60 to 100 bpm	Normal range
Above 100 bpm at rest	High. Talk to a doctor, especially if it is persistent or comes with symptoms

Within the normal range, a lower resting heart rate generally reflects better aerobic fitness. But the most useful comparison is with your own baseline, not with someone else's number.

Average Apple Watch resting heart rate: data from 60 users

The 60 to 100 bpm range is very wide. To see where Apple Watch wearers actually sit, we looked at anonymized data from 60 Bodly users with at least a week of Apple Watch resting heart rate readings (data up to September 2026). For each person we took their typical daily value, the same number the Health app shows, and then compared people.

Group	People	Median	Middle 50% of people
Everyone	60	65 bpm	58 to 71 bpm
Under 40	24	64 bpm	58 to 71 bpm
40 and over	35	70 bpm	59 to 71 bpm

• Eight in ten people sat between 53 and 73 bpm. Nobody's typical value was below 51 or above 81 bpm.
• A lower resting heart rate went with a higher HRV. People under 60 bpm had a median HRV of 48 ms, while people at 70 bpm or more had 29 ms. The two numbers really do move together, which is why recovery scores use both.

These are Bodly users, not a random sample of the population, and the groups are small. Use the table to see where you sit, not as a medical reference.

How much does resting heart rate change from day to day?

More than most people expect. In the same group of users, a typical person's Apple Watch resting heart rate changed by about 4 bpm from one day to the next, and on one day in ten it moved by 9 bpm or more.

So a jump of 3 or 4 beats is ordinary. A rise of 8 to 10 beats above your usual level is the kind of change worth noticing, and it matters most when it lasts more than a day.

Why your resting heart rate changes

Your resting heart rate moves up and down from day to day. Common reasons for a higher number than usual:

• short or poor sleep
• alcohol, especially in the evening
• an illness or infection starting
• stress
• dehydration or heat
• caffeine
• hard training without enough recovery
• some medications

Common reasons for a lower number over time:

• improving aerobic fitness
• better sleep
• lower stress
• weight loss

Resting heart rate is also one of the strongest everyday markers of how your body is ageing. It is one of the five inputs in our free biological age calculator, next to VO2 max, steps, sleep and strength training.

How to read your resting heart rate trend

One day tells you little. The trend tells you a lot:

• A gradual decline over weeks or months usually means your fitness is improving.
• A sudden jump of 8 or more beats above your usual level for a day or two often means stress, poor sleep, alcohol or an illness coming on. It is a good day to take it easier. (Smaller daily moves of 3 to 4 bpm are normal noise.)
• A rise that lasts for a week or more without an obvious reason is worth paying attention to, and worth discussing with a doctor if it continues or comes with symptoms.

Resting heart rate is even more useful next to heart rate variability (HRV). A rising resting heart rate together with a falling HRV is one of the clearest signs that your body is under strain. See good HRV by age for what a normal HRV looks like.

Turn your resting heart rate into a daily recovery score

Apple Health shows your resting heart rate, but it is up to you to notice when it is out of line with your usual. On most Apple Watch models, nothing combines it with your HRV and sleep into one clear answer. (Apple's new Readiness score does this, but only on Series 12 and Ultra 4.)

Bodly reads your resting heart rate, HRV and sleep from Apple Health and compares them with your own baseline every morning, so you can see at a glance whether today's numbers are normal, higher or lower than usual for you, together with your recovery, strain and sleep scores.

Bottom line

Apple Watch measures resting heart rate accurately enough for everyday use: in a recent study its average bias against a chest strap was essentially zero. A normal adult resting heart rate is 60 to 100 bpm, and fit people often sit lower.

The real value is in the trend. Watch for gradual improvements as your fitness grows, and treat a sudden jump above your usual level as a signal to rest, sleep and hydrate. If it stays high or comes with symptoms, see a doctor.

Keep reading

• Good HRV by age: what a normal heart rate variability looks like for you.
• Heart rate recovery by age: how fast your heart rate should drop after exercise.
• How to increase HRV: what actually improves your recovery signals.

Sources

• O'Grady B, et al. The validity of Apple Watch Series 9 and Ultra 2 for serial measurements of heart rate variability and resting heart rate. Sensors (2024).
• American Heart Association. All about heart rate.
• Monitor your heart rate with Apple Watch (Apple Support)