Resting Heart Rate: What Yours Says About Fitness, Stress and Illness

What is a normal resting heart rate?

Resting heart rate (RHR) is how many times your heart beats per minute when you are fully at rest — ideally lying down, before getting up in the morning, or during sleep. The US National Library of Medicine gives 60–100 beats per minute as the normal range for adults and children over 10, and 40–60 for well-trained athletes.

That range is wide on purpose. The largest look at real-world resting heart rate, by Quer and colleagues at Scripps Research, analysed nearly 33 million daily readings from 92,457 adults who wore a wrist tracker for at least 35 weeks:

• The average daily RHR was 65 bpm, but individual averages ranged from 40 to 109 bpm. Two healthy people's "normal" can differ by as much as 70 beats.
• RHR differed by age, sex, BMI and average sleep duration.
• There was a small seasonal pattern, with RHR lowest in July and highest in January.
• Within each person, RHR was much more consistent — but 20% of people had at least one week in which it moved by 10 bpm or more.

The practical lesson: comparing your number with a chart tells you little. Comparing it with your own last few weeks tells you a lot.

What does a low resting heart rate mean?

Usually, fitness. Regular aerobic exercise strengthens the heart so it pumps more blood per beat and needs fewer beats at rest. A meta-analysis by Reimers and colleagues pooled 191 controlled studies and found that every type of exercise studied lowered resting heart rate, with endurance training and yoga producing significant reductions in both men and women. The drops were larger in people who started with a higher resting heart rate.

A low heart rate is not automatically a good sign, though. If yours is below 60 and you feel dizzy, faint, unusually tired or short of breath, talk to a doctor; the same goes for a pulse that feels irregular. Some medications, such as beta-blockers, also lower heart rate.

Is a high resting heart rate bad for you?

Over the long term, a higher resting heart rate is linked to higher risk:

These are associations from observational studies. They don't prove that a higher heart rate causes harm, and they don't mean a single high reading is a warning. A resting heart rate that is consistently above 100 is outside the normal range and worth discussing with a doctor.

Why is my resting heart rate higher than usual?

A rise of several beats above your own baseline that lasts for a few days usually has an explanation. The common ones:

• Getting ill. Infections raise resting heart rate, sometimes before you feel sick. Radin and colleagues used Fitbit data from 47,249 users and found that the share of people with elevated RHR and longer sleep improved state-level flu predictions in all five US states studied. In a Stanford study of smartwatch data, 26 of 32 people with COVID-19 showed changes in heart rate, steps or sleep, and for 22 of the 25 with symptom information the change was detected at or before symptom onset.
• Alcohol. Pietiälä and colleagues recorded the first three hours of sleep in 4,098 Finnish employees on nights with and without alcohol. Drinking was dose-dependently linked to a shift toward the "stress" side of the nervous system and poorer overnight recovery — even at low intake. The recovery measure fell by about 9, 24 and 39 percentage points after low, moderate and high doses.
• Hard training without enough recovery. A higher morning heart rate after a heavy block is common and usually settles with easier days.
• Short sleep and stress. Sleep duration was one of the factors linked to RHR in the Scripps data, and stress pushes the nervous system in the same direction as alcohol.

Heart rate variability usually moves the opposite way on the same nights, which is why the two are worth reading together; the HRV guide explains that relationship.

How can you lower your resting heart rate?

1. Regular endurance exercise. This has the most evidence. Easy running, cycling, swimming or brisk walking several times a week; how to start running covers a gentle way in.
2. Yoga. In the Reimers meta-analysis, yoga was the other activity that significantly lowered resting heart rate in both sexes.
3. Less alcohol, especially in the evening. The overnight effect shows up even at low doses.
4. Consistent, sufficient sleep. Sleep duration tracks with RHR at the population level, and sleep is when recovery happens.

Expect change over weeks to months, not days. If your resting heart rate is high and doesn't come down with these changes, or you are taking medication that affects heart rate, discuss it with your doctor.

How do you measure resting heart rate accurately?

• Measure under the same conditions. First thing in the morning, lying down, before coffee — or let a wearable measure it during sleep, which removes most of the noise.
• Read the trend, not the day. One in five people in the Scripps data had a week that moved by 10 bpm or more. A 7-day average compared with your 30-day baseline tells you more than any single morning.
• Note what happened the day before. A number without context is a guess. A number next to "two glasses of wine" or "hard intervals" or "slept 5 hours" is an explanation.

tr8ck's sleep module reads resting heart rate from Apple Health when your watch records it, and shows it next to the sleep, alcohol, training and mood you logged — so a rising week comes with its likely causes attached. Without a wearable you can still log a morning pulse by hand, the same way tracking sleep quality manually works.

FAQ

Medical disclaimer: This article is for informational purposes only and does not constitute medical advice, diagnosis or treatment. Wearable heart-rate readings are estimates and are not medical devices for diagnosing heart conditions. If your resting heart rate is consistently outside the normal range, feels irregular, or comes with symptoms such as dizziness, fainting, chest pain or breathlessness, speak to a qualified healthcare professional. Do not change any medication without talking to your prescriber.