A healthy adult heart beats 60 to 100 times per minute at rest. Most people fall somewhere in the middle of that range, and a lower resting rate generally signals a more efficient heart. The number changes significantly with age, fitness level, and what your body is doing at any given moment.
Normal Resting Heart Rate by Age
Heart rate slows steadily from birth through adolescence. Babies under one year old average about 129 beats per minute, which can seem alarmingly fast if you’re comparing it to your own pulse. By age six to eight, the average drops to around 87 bpm, and by the late teen years it settles near 75 bpm, close to the adult range.
Here’s what CDC survey data shows for children and teens:
- Under 1 year: 103 to 156 bpm (average 129)
- 1 year: 95 to 138 bpm (average 118)
- 2 to 3 years: 86 to 124 bpm (average 107)
- 4 to 5 years: 75 to 114 bpm (average 96)
- 6 to 8 years: 68 to 105 bpm (average 87)
- 9 to 11 years: 63 to 101 bpm (average 83)
- 12 to 15 years: 58 to 98 bpm (average 78)
- 16 to 19 years: 54 to 95 bpm (average 75)
These ranges represent the 5th to 95th percentile, meaning 90% of healthy kids in each group fall within them. A child’s heart is smaller and pumps less blood per beat, so it compensates by beating faster.
Why Some Hearts Beat Slower
Fit athletes can have resting heart rates around 40 bpm without anything being wrong. Regular aerobic exercise makes the heart muscle stronger, so each contraction pushes out more blood. The heart simply doesn’t need to beat as often to circulate the same volume. This is one of the clearest, most measurable benefits of cardiovascular fitness.
If you’re not an athlete and your resting heart rate consistently sits below 60, that’s worth mentioning to a doctor. A slow heart rate (called bradycardia) can sometimes cause fatigue, dizziness, or shortness of breath if the heart isn’t pumping enough blood to meet the body’s needs.
What Pushes Your Heart Rate Up
A resting rate above 100 bpm is considered unusually fast and is called tachycardia. Plenty of temporary factors can push you there without it meaning something is wrong: stress, caffeine, dehydration, a hot room, certain medications, or simply standing up quickly. Hormonal shifts, including those during pregnancy or thyroid imbalances, also raise the rate.
Context matters. Your heart rate after climbing stairs or during an argument isn’t your resting rate. To get an accurate number, you need to be sitting quietly for several minutes with nothing stimulating your system.
Why Your Resting Rate Matters for Health
Resting heart rate isn’t just a fitness metric. A large study tracking over 422,000 people with high blood pressure for a median of 10.6 years found that mortality risk climbed about 7% for every additional 10 beats per minute. The risk became statistically significant at 80 bpm and above, and people with resting rates at or above 100 bpm had a 41% higher risk of death compared to those with lower rates. That association held even after accounting for other health conditions and fitness levels.
This doesn’t mean a single high reading is dangerous. It means a persistently elevated resting heart rate over months and years can be a signal that the cardiovascular system is working harder than it should be. Tracking your rate over time gives you a simple, free data point about your overall heart health.
How to Check Your Heart Rate
Sit down and rest quietly for a few minutes before measuring. Turn one hand palm-up and place the tips of your index and middle fingers on the inside of your wrist, between the bone and the tendon on the thumb side. Press lightly until you feel each beat. Don’t press hard enough to block blood flow.
Count the beats for a full 60 seconds using a watch or timer. A quicker method is to count for 15 seconds and multiply by four, though the full minute gives you a more accurate number, especially if your rhythm is slightly irregular. Take your pulse at the same time of day, ideally in the morning before coffee or exercise, if you want readings you can compare over time.
Wearable fitness trackers and smartwatches also measure heart rate continuously using optical sensors on the skin. These are reasonably accurate for resting measurements and convenient for spotting trends, though they can be less reliable during intense movement or if the band is loose.
What Changes Your Rate Over Time
The most effective way to lower a high resting heart rate is regular aerobic exercise: walking, running, cycling, swimming, or anything that keeps your heart rate elevated for sustained periods. Over weeks to months, the heart adapts by growing stronger and more efficient per beat. Even moderate activity, like brisk walking for 30 minutes most days, produces measurable changes.
Chronic stress, poor sleep, smoking, and excessive alcohol keep resting heart rate elevated. Addressing any of these tends to bring the number down. Some people notice their resting rate drops 5 to 10 bpm within a few months of starting a consistent exercise routine or quitting smoking. That kind of shift, based on the mortality data above, represents a meaningful reduction in long-term cardiovascular risk.