A normal resting heart rate for adults falls between 60 and 100 beats per minute (bpm). That range, endorsed by the American Heart Association, applies to anyone 18 and older who is awake and sitting still. Where you land within it depends on your fitness level, age, medications, and even the time of day.
Normal Ranges by Age
Hearts beat fastest in the first weeks of life and gradually slow as the body matures. A newborn’s resting heart rate can reach 205 bpm, while a toddler typically sits between 98 and 140 bpm. By school age (5 to 12 years), the range narrows to 75 to 118 bpm. Once a child hits adolescence, the adult range of 60 to 100 bpm kicks in and stays there for the rest of life.
Here’s a quick reference:
- Newborn (birth to 4 weeks): 100 to 205 bpm
- Infant (4 weeks to 1 year): 100 to 180 bpm
- Toddler (1 to 3 years): 98 to 140 bpm
- Preschool (3 to 5 years): 80 to 120 bpm
- School age (5 to 12 years): 75 to 118 bpm
- Adolescent (13 to 17 years): 60 to 100 bpm
- Adult (18 and older): 60 to 100 bpm
These numbers apply when awake and at rest. During sleep or exercise, the picture changes considerably.
Why Athletes Often Fall Below 60 bpm
A resting heart rate under 60 bpm is technically called bradycardia, but in fit people it’s usually a sign of cardiovascular efficiency, not a problem. When the heart muscle is stronger, it pumps more blood per beat and doesn’t need to beat as often to meet the body’s demands.
Among endurance athletes, low rates are remarkably common. A study of 465 endurance athletes found that 38% had a resting heart rate at or below 40 bpm on a 24-hour monitor. About 2% dropped to 30 bpm or lower. Current guidelines say a heart rate under 30 bpm warrants further evaluation even in athletes, but above that threshold, a slow rate without symptoms is generally considered normal for someone who trains regularly.
Lower Isn’t Always Better, but It Helps
Your resting heart rate is more than just a number on a fitness tracker. It’s a meaningful indicator of cardiovascular health over time. A 16-year study following men in Copenhagen found that for every 10 bpm increase in resting heart rate, the risk of dying from any cause rose by about 16%.
The differences were striking at the extremes. Compared to men with a resting rate of 50 bpm or lower, those with rates between 51 and 80 bpm had a 40 to 50% higher risk of death. Rates between 81 and 90 bpm doubled the risk. Above 90 bpm, the risk tripled. These associations held even after accounting for fitness level and other health factors, which suggests resting heart rate carries independent predictive value.
This doesn’t mean a rate of 85 bpm is dangerous on its own. But if your resting rate has been climbing over months or years, it may be worth paying attention to the lifestyle factors that influence it.
What Affects Your Resting Heart Rate
Plenty of everyday variables push your heart rate up or down, sometimes by 10 to 20 bpm in either direction.
Heat is one of the most immediate. Hot environments activate the body’s stress response, raising heart rate and reducing the natural variation between beats. Caffeine and alcohol have similar short-term effects. Acute alcohol consumption reliably increases resting heart rate, though moderate, consistent drinking (one standard drink per day for women, two for men) doesn’t appear to cause lasting changes.
Stress is a major player. Mental stress, work pressure, and poor sleep all shift the nervous system toward a fight-or-flight state, keeping heart rate elevated even at rest. Chronic stress can sustain that effect over weeks and months. Certain medications also directly affect heart rate. Beta-blockers, for instance, are specifically designed to slow it, so people taking them may see resting rates well below 60 bpm without any cause for concern.
Dehydration, fever, and hormonal fluctuations (including thyroid changes and the menstrual cycle) can all temporarily raise your baseline as well.
Your Heart Rate Drops Significantly During Sleep
If you wear a smartwatch or fitness tracker overnight, you’ve probably noticed your heart rate dips well below its daytime resting level. That’s normal. During sleep, your heart rate typically runs 20% to 30% lower than your daytime resting rate. For someone with a waking rate of 70 bpm, that means nighttime rates in the upper 40s to mid-50s are expected.
The lowest rates occur during deep, non-REM sleep, when blood pressure also drops. During REM sleep (the stage associated with dreaming), heart rate picks back up and becomes more variable. This overnight pattern is one reason sleep trackers can provide useful health data: a nighttime rate that fails to dip, or one that’s steadily rising over weeks, can signal stress, illness, or poor sleep quality.
How to Measure Your Resting Heart Rate
The most reliable time to check is first thing in the morning, before you get out of bed, drink coffee, or look at your phone. Sit or lie still for a couple of minutes, then find your pulse at one of two spots: the inside of your wrist (just below the base of the thumb) or the side of your neck (just below the jawline). Place two fingers gently on the artery and count the beats for a full 60 seconds. Alternatively, count for 15 seconds and multiply by four, though the full minute gives a more accurate result.
Smartwatches and fitness trackers are a convenient alternative, and their accuracy has improved substantially. A 2025 review of smartwatch performance found that devices from Apple, Samsung, and Withings detected irregular heart rhythms with 89 to 97% sensitivity and 95 to 98% specificity compared to clinical-grade monitors. For basic heart rate readings at rest, consumer wearables are generally reliable enough to track trends over time. They’re less accurate during vigorous movement, so the resting readings (especially overnight averages) tend to be the most useful data points.
When a Heart Rate Sits Outside the Range
A resting heart rate consistently above 100 bpm is called tachycardia. It can result from anxiety, dehydration, fever, anemia, caffeine, or an overactive thyroid, among other causes. Sometimes it signals an electrical problem in the heart itself. If your resting rate stays above 100 without an obvious trigger like recent exercise or a hot room, it’s worth getting checked.
On the low end, bradycardia (below 60 bpm) is common in athletic or physically active people and usually harmless. It becomes a concern when paired with symptoms like dizziness, fainting, unusual fatigue, or shortness of breath. These signs suggest the heart may not be pumping enough blood to meet the body’s needs.
Perhaps the most useful metric isn’t any single reading but your trend over time. A resting heart rate that gradually drops as you get fitter, or holds steady in the 60s and 70s over months, generally reflects good cardiovascular health. A rate that creeps upward without explanation deserves attention.