A normal resting heart rate for adults falls between 60 and 100 beats per minute (bpm). That range applies when you’re sitting quietly or lying down, not during or immediately after physical activity. Where you land within that window depends on your fitness level, age, medications, and even the time of day.
Normal Ranges by Age
Heart rate norms shift dramatically from birth through adolescence. Newborns have the fastest hearts, and the rate gradually slows as a child grows. Here are the typical awake ranges:
- Newborn to 3 months: 85 to 205 bpm
- 3 months to 2 years: 100 to 190 bpm
- 2 to 10 years: 60 to 140 bpm
- Over 10 years and adults: 60 to 100 bpm
By about age 10, children settle into the same 60 to 100 bpm range that applies for the rest of adulthood. During sleep, rates naturally drop. Kids aged 2 to 10 typically fall to 60 to 90 bpm while sleeping, and older children and adults often dip to 50 to 90 bpm.
What Happens During Sleep
Your heart rate doesn’t stay fixed at your daytime number once you fall asleep. It typically runs 20% to 30% lower than your waking resting rate, according to Cleveland Clinic cardiologist Michael Faulx. The lowest point generally occurs during deep, non-REM sleep, when blood pressure also cycles down. So if your resting rate sits around 70 bpm during the day, seeing it drop into the low 50s overnight is completely expected.
Why Athletes Have Lower Heart Rates
Highly trained endurance athletes routinely have resting heart rates well below 60 bpm. Their hearts pump more blood with each beat, so they don’t need to beat as often. A study in Circulation that monitored 465 endurance athletes found that 38% had heart rates at or below 40 bpm on a 24-hour monitor, and 2% dropped to 30 bpm or lower. These athletes tolerated those low rates without symptoms.
If you’re not an endurance athlete and your resting heart rate consistently sits below 60, that’s technically called bradycardia. It isn’t always a problem, especially if you feel fine, but it’s worth mentioning to a doctor if you notice dizziness, fatigue, or fainting.
When Heart Rate Signals Risk
Anything above 100 bpm at rest is classified as tachycardia. Short bursts from caffeine, stress, or dehydration are common and usually harmless. A persistently elevated resting rate, though, is a different story.
Large, long-term studies consistently link higher resting heart rates to shorter lifespans. In the Framingham Heart Study, which tracked over 5,000 men and women for 30 years, mortality was highest among those with the fastest resting rates, particularly men over 65 with rates above 84 bpm. Another study of nearly 4,800 adults aged 40 to 80 found the lowest risk of death in people with resting rates below 60, while those above 90 bpm had mortality rates more than double. A separate analysis of nearly 7,800 people found a similar pattern: rates above 90 carried more than twice the risk of major heart events compared to rates below 60.
None of this means a heart rate of 85 is dangerous on its own. These are population-level trends, and many factors contribute to overall risk. But if your resting rate has been creeping upward over months or years, that trend is worth paying attention to.
What Affects Your Resting Heart Rate
Your number on any given day reflects a mix of factors. Caffeine and nicotine both raise heart rate temporarily. So do stress, anxiety, pain, fever, and dehydration. Some medications, particularly stimulants and certain asthma drugs, push it up, while beta-blockers and calcium channel blockers bring it down. Even air temperature plays a role: hot, humid conditions make your heart work harder.
Fitness is the most controllable long-term influence. Regular aerobic exercise strengthens the heart muscle so it moves more blood per beat, gradually lowering your resting rate over weeks and months. This is why consistent runners and cyclists often sit in the 40s or 50s without any underlying problem.
How to Measure Your Heart Rate Accurately
The simplest method is a manual pulse check. Place two fingers on the inside of your wrist, just below the base of your thumb. Count the beats for 30 seconds and multiply by two. Do this in the morning before getting out of bed for the most consistent reading.
Smartwatches and fitness trackers generally measure heart rate accurately enough for everyday use. A validation study published in JMIR mHealth and uHealth found that both a smartwatch and a portable health device met clinical accuracy standards for heart rate. However, the smartwatch failed to detect 67% of bradycardic readings (very low heart rates) and couldn’t produce any reading at all for about a third of attempts. If your wearable shows something unusual, a manual check or a fingertip pulse oximeter can confirm the number.
Maximum Heart Rate During Exercise
Your maximum heart rate, the fastest your heart can safely beat during intense exercise, declines with age. The old rule of thumb was 220 minus your age, but a more accurate formula based on a large meta-analysis is 208 minus 0.7 times your age. For a 40-year-old, that’s about 180 bpm. For a 60-year-old, roughly 166 bpm.
The traditional formula overestimates maximum heart rate in younger adults and underestimates it in older adults. The two formulas happen to intersect around age 40, so if you’re near that age, either one gives a similar result. These are still estimates with individual variation of 10 to 12 bpm in either direction, so a directly measured maximum (from a supervised exercise test) is more reliable if precise training zones matter to you.
Most exercise guidelines recommend working at 50% to 85% of your maximum heart rate for cardiovascular benefit. For that same 40-year-old with a max of 180, that means a target zone of roughly 90 to 153 bpm during workouts.