A healthy resting heart rate for adults falls between 60 and 100 beats per minute (bpm). That range covers most people, but your ideal number depends on your age, fitness level, medications, and whether you’re awake, asleep, exercising, or pregnant. Here’s how to make sense of your heart rate in every context.
Resting Heart Rate for Adults
When you’re sitting quietly and haven’t recently exercised, eaten a large meal, or had caffeine, your heart rate should land somewhere between 60 and 100 bpm. This is your resting heart rate, and it’s the single most useful baseline number to know. Many fit adults sit closer to the lower end of that range, and well-trained endurance athletes often have resting rates in the 40s or 50s because their hearts pump more blood with each beat.
A resting heart rate consistently above 100 bpm is called tachycardia. It doesn’t always signal a problem (anxiety, dehydration, and caffeine can all push you above 100 temporarily), but it’s worth paying attention to if it happens often at rest. On the flip side, a rate below 60 bpm isn’t automatically concerning. If you feel fine and you’re physically active, a lower resting rate typically reflects good cardiovascular fitness.
Heart Rate Ranges for Children
Children’s hearts beat faster than adults’, and what counts as “normal” shifts significantly with age. Federal health guidelines break it down like this:
- Newborn to 3 months: 85 to 205 bpm awake, 80 to 160 bpm asleep
- 3 months to 2 years: 100 to 190 bpm awake, 75 to 160 bpm asleep
- 2 to 10 years: 60 to 140 bpm awake, 60 to 90 bpm asleep
- Over 10 years: 60 to 100 bpm awake, 50 to 90 bpm asleep
By adolescence, a child’s resting heart rate looks essentially the same as an adult’s. The wide ranges for infants can seem alarming, but babies’ heart rates fluctuate a lot with crying, feeding, and sleep. A reading in the middle of the range for your child’s age group is perfectly typical.
What Your Heart Rate Should Be During Sleep
Your heart rate naturally drops while you sleep, typically running about 20% to 30% lower than your daytime resting rate. For most healthy adults, that puts the sleeping range at roughly 50 to 75 bpm. This dip is a sign your nervous system is doing its job, shifting into a recovery state overnight.
If you wear a fitness tracker to bed, pay less attention to any single night’s number and more to the trend over weeks. A gradual rise in your average sleeping heart rate can reflect poor sleep quality, increased stress, an oncoming illness, or overtraining if you’re an athlete. A consistently flat or absent overnight dip is also worth noting, as it can be associated with conditions like sleep apnea or high blood pressure.
Target Heart Rate During Exercise
During a workout, your heart rate should climb well above resting levels. How high depends on the intensity you’re aiming for and your estimated maximum heart rate.
Estimating Your Maximum Heart Rate
The simplest formula is 220 minus your age. A 40-year-old would have an estimated max of 180 bpm. A more refined formula, developed by researcher Hirofumi Tanaka, uses 208 minus 0.7 times your age, which gives slightly different results (for that same 40-year-old: 180 vs. 180, but the gap widens at older ages). Neither formula is perfect for every individual, but both give you a reasonable starting point.
Moderate vs. Vigorous Zones
Moderate-intensity exercise (brisk walking, casual cycling, light swimming) should put you at about 50% to 70% of your maximum heart rate. For a 40-year-old with an estimated max of 180, that’s roughly 90 to 126 bpm. Vigorous-intensity exercise (running, competitive sports, high-intensity interval training) pushes you to 70% to 85% of max, or about 126 to 153 bpm for that same person.
You don’t need to obsess over exact zones. A practical shortcut: during moderate exercise, you should be able to talk but not sing. During vigorous exercise, you can only get out a few words before needing a breath.
Heart Rate Recovery After Exercise
How quickly your heart rate drops after you stop exercising is one of the best simple indicators of cardiovascular fitness. The benchmark: your heart rate should fall by at least 18 beats within the first minute of rest after vigorous exercise. A smaller drop can suggest your cardiovascular system is under more strain than it should be, and tracking this number over time gives you a concrete way to measure whether your fitness is improving.
To check it yourself, note your heart rate the moment you stop exercising, then check again after 60 seconds of standing or walking slowly. The difference is your one-minute heart rate recovery.
How Pregnancy Changes Your Heart Rate
Pregnancy increases resting heart rate significantly. The rise begins in the first trimester and continues climbing, peaking in the third trimester. By the end of pregnancy, resting heart rate often increases by 10 to 20 bpm, representing roughly a 20% to 25% jump from pre-pregnancy levels. So if your resting rate was 70 bpm before pregnancy, seeing 85 to 90 bpm in your third trimester is expected.
This happens because blood volume increases by nearly 50% during pregnancy, and the heart has to work harder to circulate it. The increase is gradual and normal, though a sudden spike or a resting rate that feels uncomfortably fast is worth mentioning to your provider.
What Can Push Your Heart Rate Higher or Lower
Several everyday factors shift your heart rate outside its usual range. Caffeine, nicotine, and stimulant medications increase sympathetic nervous system activity, which speeds the heart up. Even moderate amounts of caffeine can raise resting heart rate by several beats per minute in people who are sensitive to it. Cocaine and amphetamines cause more dramatic spikes and can trigger dangerous heart rhythms.
On the other side, medications like beta-blockers deliberately slow the heart by suppressing the electrical signals that set its pace. If you take a beta-blocker, your resting heart rate and exercise heart rate will both run lower than the standard ranges listed above, and the usual target heart rate zones during exercise won’t apply to you.
Other common influences include dehydration (which forces the heart to beat faster to maintain blood pressure), fever (heart rate rises roughly 10 bpm for every degree Fahrenheit of temperature increase), stress and anxiety, and alcohol. Even body position matters: your heart rate is a few beats higher when standing than when lying down.
How Accurate Is Your Wearable?
Smartwatches and fitness trackers use optical sensors on your wrist to estimate heart rate, and their accuracy varies more than most people realize. A study published in the Journal of the American College of Cardiology tested several major brands (Apple Watch, Fitbit, Garmin, Polar, and Jabra) against medical-grade ECG monitors and found that at rest, wrist devices were off by an average of about 5 bpm in people with normal heart rhythms. That’s close enough to be useful for everyday tracking.
During peak exercise, accuracy dropped considerably, with average errors around 14 bpm in people with normal rhythms. For people with atrial fibrillation (an irregular heart rhythm), the errors were much larger, averaging 29 bpm during exercise. The takeaway: wearables are reasonable for spotting trends in your resting heart rate and getting a rough sense of exercise intensity, but they’re not precise enough to rely on for medical decisions or to fine-tune exact training zones.
For the most accurate manual reading, 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.