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 right after physical activity. Your actual number within that range depends on your fitness level, age, medications, and even your body position when you check it.
Normal Resting Heart Rate for Adults
The 60 to 100 bpm window is the standard reference range used in clinical settings, but most healthy adults at rest land somewhere in the 60s to 80s. A rate consistently near the lower end of that range generally signals good cardiovascular fitness, since a stronger heart pumps more blood per beat and doesn’t need to beat as often. A resting rate consistently above 100 bpm is classified as tachycardia, which can be caused by stress, caffeine, dehydration, fever, or an underlying heart rhythm issue.
Where you fall within the range can shift throughout the day. Your heart rate is typically lowest in the early morning hours while you sleep and rises naturally when you stand up, eat, feel anxious, or deal with temperature extremes. If you stand up quickly, your heart rate can noticeably increase within 15 to 20 seconds as your body adjusts to the position change.
Heart Rate in Infants and Children
Children’s hearts beat significantly faster than adults’. A newborn’s median heart rate is around 127 bpm, climbing to roughly 145 bpm by about one month of age. From there it gradually declines, reaching approximately 113 bpm by age two. The downward trend continues through childhood and adolescence until it approaches the adult range in the mid-to-late teenage years. So if your toddler’s heart seems to be racing compared to yours, that’s completely expected.
Why Athletes Have Much Lower Heart Rates
Endurance athletes commonly have resting heart rates between 40 and 60 bpm. In elite cyclists and rowers, rates as low as 30 bpm have been recorded, and some elite athletes dip below 30 bpm during sleep. This isn’t a sign of a problem. Research suggests that sustained endurance training physically remodels the heart’s natural pacemaker cells, making them fire more slowly. The heart itself becomes more efficient, ejecting more blood with each contraction so it simply doesn’t need to beat as frequently.
This is different from pathological bradycardia, where a slow heart rate results from disease, aging, or electrical conduction problems. In those cases, the slow rate may cause dizziness, fatigue, or fainting because the heart isn’t pumping enough blood. An athlete with a heart rate of 45 bpm who feels fine and performs well has a healthy adaptation, not a medical condition.
How to Check Your Resting Heart Rate
The simplest method is a manual pulse check at your wrist or neck. Place two fingers (index and middle) on the inside of your wrist, just below the base of your thumb, and press lightly until you feel the pulse. Count the beats for 30 seconds and multiply by two. For a quicker estimate, count for 10 seconds and multiply by six.
For the most accurate resting reading, check your pulse first thing in the morning before getting out of bed, or after sitting quietly for at least five minutes. Avoid measuring right after standing up, exercising, or drinking coffee. Consistency matters more than any single reading, so checking at the same time of day under similar conditions gives you the best picture of your baseline.
What Affects Your Heart Rate
Your resting heart rate isn’t a fixed number. It responds to a wide range of everyday factors:
- Fitness level: Regular aerobic exercise lowers resting heart rate over weeks and months as the heart becomes more efficient.
- Stress and anxiety: Emotional stress triggers the same fight-or-flight response as physical exertion, pushing your heart rate up even while you’re sitting still.
- Caffeine and stimulants: Coffee, energy drinks, and certain medications can temporarily raise your rate.
- Fever and illness: Your heart beats faster when your body temperature rises, typically adding about 10 bpm per degree Fahrenheit of fever.
- Medications: Beta-blockers and some blood pressure drugs deliberately lower heart rate. Other medications, including certain decongestants and asthma inhalers, can raise it.
- Dehydration: When blood volume drops, the heart compensates by beating faster to maintain circulation.
- Body position: Heart rate is lowest when lying down and increases slightly when sitting or standing.
Heart Rate During Exercise
Your heart rate during a workout should be higher than your resting rate, but there’s a useful framework for gauging intensity. The American Heart Association defines moderate-intensity exercise as 50 to 70% of your maximum heart rate, and vigorous exercise as 70 to 85% of maximum.
To estimate your maximum heart rate, the traditional formula is 220 minus your age. A more accurate version, developed from a meta-analysis of 351 studies involving nearly 19,000 participants, uses 208 minus 0.7 times your age. For a 50-year-old, the traditional formula gives 170 bpm while the updated one gives 173 bpm. The difference becomes more meaningful for older adults, where the classic formula tends to underestimate the true maximum, potentially leading people to exercise at lower intensities than they’re capable of.
Using the updated formula, a 40-year-old has an estimated max of about 180 bpm. Moderate exercise would put their heart rate between 90 and 126 bpm, while vigorous exercise would push it to 126 to 153 bpm.
Heart Rate Variability: A Different Metric
Heart rate variability (HRV) measures the tiny fluctuations in timing between consecutive heartbeats. Even if your heart rate reads 70 bpm, the gap between individual beats isn’t perfectly uniform. It might be 0.85 seconds between one pair of beats and 0.87 seconds between the next. HRV captures this variation, and it reflects how well your nervous system adapts to changing demands.
Higher HRV generally indicates better cardiovascular health and greater resilience to stress. Lower HRV is associated with chronic stress, poor sleep, and increased cardiovascular risk. In studies of heart attack survivors, those with higher 24-hour HRV measurements had a 5.3 times lower risk of death during follow-up compared to those with the lowest readings.
That said, higher HRV isn’t always better. Certain abnormal heart rhythms can artificially inflate HRV numbers, which is actually linked to increased mortality risk, particularly in older adults. Context matters. Most consumer wearables now track HRV, and while trends in your own data over weeks can be informative, comparing your numbers to someone else’s isn’t particularly useful since individual variation is enormous.