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 relaxing, not during or right after physical activity. Where you land within that window depends on your fitness level, age, medications, and several other factors worth understanding.
Adult Resting Heart Rate
The 60 to 100 bpm range is the standard benchmark used in clinical medicine. Most healthy adults sit somewhere in the middle of that range, typically between 65 and 85 bpm. A lower resting heart rate generally signals a more efficient heart. With each beat, a well-conditioned heart pumps more blood, so it doesn’t need to beat as often to keep up with the body’s demands.
Very fit endurance athletes can have resting heart rates closer to 40 bpm, which is perfectly healthy for them. Their hearts have adapted to sustained training and simply don’t need to work as hard at rest. If you’re not a trained athlete and your resting rate regularly dips below 60 bpm, that’s worth mentioning to a doctor, since it can sometimes indicate an electrical problem with the heart.
Normal Heart Rate by Age in Children
Children’s hearts beat considerably faster than adult hearts, and what counts as “normal” shifts dramatically in the first few years of life. Here’s how the ranges break down when a child is awake:
- 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: 60 to 100 bpm (same as adults)
During sleep, those numbers drop. A sleeping newborn may run 80 to 160 bpm, while a sleeping child over 10 typically falls between 50 and 90 bpm. The wide ranges exist because children’s heart rates are especially sensitive to activity, crying, fever, and excitement. A toddler’s heart rate can spike simply from being upset, then settle back down within minutes.
Heart Rate During Sleep
Your heart rate drops significantly while you sleep, typically running 20% to 30% lower than your daytime resting rate. For most healthy adults, that translates to roughly 50 to 75 bpm overnight. This dip is normal and reflects your nervous system shifting into a more restorative mode as your body’s demand for oxygen decreases.
Heart rate isn’t constant through the night, either. It tends to reach its lowest point during deep sleep and can climb during REM sleep, when your brain is more active and dreaming occurs. If you use a wearable device that tracks overnight heart rate, seeing some fluctuation is expected.
When Heart Rate Is Too Fast or Too Slow
Doctors use two terms when heart rate falls outside the normal range. Bradycardia refers to a resting heart rate below 60 bpm. Tachycardia means a resting heart rate above 100 bpm. Neither one is automatically dangerous, but both can signal an underlying issue depending on context.
Bradycardia in a fit person is usually harmless. In someone who isn’t physically active, it can cause dizziness, fatigue, or fainting if the heart isn’t pumping enough blood to meet the body’s needs. Tachycardia at rest, on the other hand, can result from dehydration, anxiety, fever, anemia, thyroid problems, or heart rhythm disorders. A heart rate that stays above 100 bpm while you’re calm and at rest, especially on multiple occasions, deserves medical attention.
What Affects Your Resting Heart Rate
Your resting heart rate isn’t a fixed number. It shifts throughout the day and can be influenced by a surprisingly long list of factors.
Fitness is the biggest modifier. Regular aerobic exercise strengthens the heart muscle, allowing it to pump more blood per beat and lowering your resting rate over time. Even a few months of consistent cardio can bring a noticeable drop. Stress and anxiety push heart rate in the other direction. Chronic stress, burnout, and psychiatric conditions like depression and PTSD are all associated with measurable changes in how the heart responds to the nervous system.
Temperature matters too. Heat exposure raises heart rate because your cardiovascular system works harder to cool you down, moving more blood toward the skin’s surface. Dehydration has a similar effect: with less fluid volume in the bloodstream, the heart compensates by beating faster. Even a cup of coffee can temporarily bump your rate up by a few beats per minute.
Certain medications also change the picture significantly. Beta-blockers, one of the most commonly prescribed classes of heart medication, work by blocking adrenaline’s effects on the heart, deliberately slowing heart rate and reducing the force of each beat. If you take a beta-blocker, a resting heart rate in the 50s or even high 40s may be your new normal. Stimulant medications, including those used for ADHD, tend to push heart rate upward.
How to Check Your Resting Heart Rate
The most reliable reading comes first thing in the morning, before you get out of bed. Place two fingers (index and middle) on the inside of your wrist, just below the base of your thumb, and count the beats for 30 seconds. Multiply by two. That’s your resting heart rate in beats per minute.
Avoid checking right after caffeine, exercise, or a stressful moment. Those will all inflate the number. If you want a true baseline, measure it on three or four mornings and take the average. Wearable fitness trackers and smartwatches can do this automatically, though they’re slightly less accurate than a manual count, particularly during movement.
Target Heart Rate During Exercise
When you exercise, your heart rate should climb well above its resting level. How high depends on the intensity you’re aiming for. The American Heart Association defines moderate-intensity exercise as 50% to 70% of your maximum heart rate, and vigorous exercise as 70% to 85%.
To estimate your maximum heart rate, the most widely used formula is 208 minus 0.7 times your age. This updated equation, based on a large meta-analysis, replaced the older “220 minus your age” formula, which was originally derived somewhat arbitrarily from a handful of studies in the 1970s. For a 40-year-old, the updated formula gives a maximum of about 180 bpm. Moderate exercise would mean keeping your heart rate between 90 and 126 bpm, while vigorous exercise would target 126 to 153 bpm.
These zones are estimates, not hard rules. Some people naturally run higher or lower. The numbers are most useful as a general guide to make sure you’re pushing hard enough to get cardiovascular benefits without overdoing it.