A healthy resting heart rate for adults falls between 60 and 100 beats per minute (bpm). That said, where you land within that range depends on your age, fitness level, medications, and even how much caffeine you drink. A lower resting heart rate generally signals a stronger, more efficient heart.
How to Get an Accurate Reading
Your resting heart rate is the number of times your heart beats each minute while you’re awake, calm, and not moving. The best time to check it is right after you wake up in the morning, before you get out of bed or reach for coffee. Anything that raises your alertness or energy, even mild stress or standing up, can push the number higher and give you a less reliable baseline.
To measure it yourself, place two fingers on the inside of your wrist or the side of your neck. Count the beats for 30 seconds and multiply by two. Most smartwatches and fitness trackers do this automatically, though their accuracy varies. If your device gives you a number that seems off, a manual check is a good sanity test.
Healthy Ranges by Age
Children’s hearts beat significantly faster than adults’. A baby under one year old has an average resting heart rate around 129 bpm, which gradually drops as the child grows. By ages 6 to 8, the average is about 87 bpm. Teenagers aged 16 to 19 average around 75 bpm, which is already close to typical adult values.
Girls tend to run a few beats per minute higher than boys at every age. For example, the median resting rate for 16- to 19-year-old males is 69 bpm, while for females the same age it’s 77 bpm. This sex-based difference persists into adulthood.
Here’s a snapshot of average resting heart rates by age group, based on national survey data from the CDC:
- Under 1 year: ~129 bpm
- 2 to 3 years: ~107 bpm
- 4 to 5 years: ~96 bpm
- 6 to 8 years: ~87 bpm
- 9 to 11 years: ~83 bpm
- 12 to 15 years: ~78 bpm
- 16 to 19 years: ~75 bpm
- Adults: 60 to 100 bpm
Why Athletes Have Lower Heart Rates
Endurance athletes and highly active people can have resting heart rates as low as 40 bpm. This isn’t a sign of a problem. A well-conditioned heart pumps more blood with each beat, so it doesn’t need to beat as often to meet the body’s demands. Think of it as an engine that’s become more efficient: same output, fewer revolutions.
This is why a lower resting heart rate within the normal range is generally a positive sign. If you start exercising regularly and notice your resting rate dropping from, say, 78 to 68 over several months, your cardiovascular fitness is improving.
When Your Heart Rate Is Too High or Too Low
A resting heart rate above 100 bpm in an adult is called tachycardia. Below 60 bpm is technically called bradycardia, though population studies often use 50 bpm as a more practical cutoff since many healthy, fit people sit comfortably in the 50s. A rate below 60 in someone who exercises regularly is not a concern on its own.
The number alone doesn’t tell the whole story. What matters is whether you’re experiencing symptoms alongside an unusual rate. A resting heart rate of 55 with no symptoms in an active person is fine. A rate of 110 with chest pain and shortness of breath is an emergency. Pay attention to how you feel: dizziness, fainting, chest pain, or persistent shortness of breath alongside an abnormal rate are signals that need immediate medical attention.
What Affects Your Resting Heart Rate
Several everyday factors can shift your resting heart rate by 10 or more beats per minute, which is why a single reading doesn’t always paint a full picture.
Caffeine is one of the most common influences. Chronic consumption at around 400 mg per day (roughly four cups of coffee) significantly affects the autonomic nervous system, raising both heart rate and blood pressure over time. People who consume more than 600 mg daily show elevated heart rates that persist even after resting. This means your “resting” heart rate might not reflect your true baseline if you’re a heavy caffeine drinker.
Stress and anxiety activate your fight-or-flight response, which speeds up your heart. Chronic stress keeps this system running in the background, nudging your resting rate higher than it would otherwise be. Dehydration, fever, and hot weather also force your heart to work harder to circulate blood, temporarily raising your rate. Even body position matters: your heart beats a few bpm faster when standing compared to lying down.
Medications are a major factor. Blood pressure medications, particularly beta-blockers, commonly lower resting heart rate. Some people on beta-blockers see their rate drop into the 50s or even 40s. On the other hand, certain asthma medications, stimulant medications for ADHD, and some antipsychotics can push the rate higher. If you take any of these, your “normal” may look different from the standard range.
Heart Rate During Exercise
When you’re working out, a healthy heart rate depends on the intensity you’re aiming for. Exercise heart rate zones are calculated as percentages of your maximum heart rate.
The classic formula for estimating your maximum heart rate is 220 minus your age. So a 40-year-old would have an estimated max of 180 bpm. A more accurate formula, developed by researcher Hirofumi Tanaka, uses 208 minus 0.7 times your age. For that same 40-year-old, the result is 180 bpm (the two formulas happen to converge around age 40). The difference becomes meaningful at older ages: for a 70-year-old, the classic formula gives 150 while the Tanaka formula gives 159. The older formula tends to underestimate max heart rate in older adults, which can lead to exercise targets that are too easy.
Once you know your estimated max, the zones break down like this:
- Moderate intensity: 50% to 70% of your max. This is a brisk walk, easy bike ride, or casual swim. You can hold a conversation but you’re breathing harder than at rest.
- Vigorous intensity: 70% to 85% of your max. This is running, fast cycling, or a challenging group fitness class. You can speak a few words at a time but not carry on a full conversation.
For a 40-year-old with an estimated max of 180, moderate intensity means keeping your heart rate between 90 and 126 bpm, while vigorous means 126 to 153 bpm.
Heart Rate Variability: A Deeper Metric
If your fitness tracker reports heart rate variability (HRV), that’s measuring the tiny fluctuations in time between each heartbeat. Unlike your heart rate itself, where lower is better, with HRV you generally want a higher number. A higher HRV indicates your body can shift gears efficiently, recovering quickly from stress and bouncing back after exertion.
Normal HRV ranges change dramatically with age. Someone in their 20s typically falls between 55 and 105 milliseconds, while someone in their 60s is more likely between 25 and 45 milliseconds. Stress, poor sleep, illness, and overtraining all lower HRV. If you’re tracking it over time, look for trends rather than fixating on any single reading.