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 window depends on your fitness level, age, medications, and several other factors.
Normal Heart Rate by Age
Children’s hearts beat significantly faster than adults’, and the younger the child, the faster the rate. A newborn up to 3 months old has a normal range of 110 to 160 bpm. Between 3 and 6 months, that drops slightly to 100 to 150 bpm. From 6 to 12 months, expect 90 to 130 bpm.
Toddlers aged 1 to 3 typically fall between 80 and 125 bpm. By ages 3 to 6, the range narrows to 70 to 115 bpm. Once children reach age 6, their resting heart rate settles into the adult range of 60 to 100 bpm, where it stays through adolescence and adulthood.
What Affects Your Resting Heart Rate
Fitness level is one of the biggest influences. Well-trained endurance athletes often have resting heart rates well below 60 bpm because their hearts pump more blood with each beat, so fewer beats are needed to circulate the same volume. A resting rate in the 40s or 50s can be perfectly healthy for someone who exercises regularly.
Body size plays a role too. People with obesity tend to have higher resting heart rates than people without. Temperature matters: being in the heat or running a fever pushes your heart rate up because your heart works harder to cool your body. Even standing up from a seated position causes a brief, small increase as your cardiovascular system adjusts to the shift in gravity.
Emotions are a surprisingly powerful driver. Stress, anxiety, excitement, and even sadness can raise your pulse noticeably. Pain does the same thing. Medications also shift the number in either direction. Beta blockers and calcium channel blockers, commonly prescribed for blood pressure and heart conditions, slow the heart rate. Stimulants like caffeine and decongestants can speed it up.
How to Check Your Heart Rate
The simplest method is to press your index and middle fingers gently against the inside of your wrist, just below the base of your thumb. You should feel a pulse in the radial artery. Count the number of beats you feel in 15 seconds, then multiply by four to get your beats per minute. You can also feel the pulse on the side of your neck, just below the jawline.
For the most accurate resting measurement, check your pulse first thing in the morning before getting out of bed, or after sitting quietly for at least five minutes. Checking right after exercise, caffeine, or a stressful moment will give you an elevated reading that doesn’t reflect your true resting rate. Fitness trackers and smartwatches provide continuous readings that can be useful for spotting trends over time, though their accuracy varies by device and how snugly you wear them.
When a Heart Rate Is Too Fast or Too Slow
A resting heart rate above 100 bpm is called tachycardia. It doesn’t always signal a problem. Dehydration, fever, anxiety, and too much caffeine can all push you over that threshold temporarily. But a consistently elevated resting heart rate, especially with symptoms like dizziness, shortness of breath, or chest discomfort, deserves medical attention.
A resting rate below 60 bpm is called bradycardia. As mentioned, this is common and normal in fit individuals. It becomes a concern when it’s accompanied by fatigue, fainting, lightheadedness, or confusion, which can indicate the heart isn’t pumping enough blood to meet the body’s needs.
Heart Rate During Exercise
Your heart rate naturally climbs during physical activity, and how high it goes depends on the intensity. A useful reference point is your estimated maximum heart rate, calculated by subtracting your age from 220. A 40-year-old, for example, has an estimated maximum of about 180 bpm.
During moderate-intensity exercise (brisk walking, casual cycling), your heart rate should land at roughly 50 to 70% of that maximum. For vigorous activity (running, intense swimming), the target zone is 70 to 85% of maximum. Staying within these ranges helps you gauge whether you’re working hard enough to build cardiovascular fitness without overexerting yourself. For that 40-year-old, moderate intensity means a heart rate of about 90 to 126 bpm, and vigorous intensity means roughly 126 to 153 bpm.
What Your Resting Heart Rate Tells You Over Time
A single reading is a snapshot, but tracking your resting heart rate over weeks and months reveals meaningful trends. If you start a new exercise program, you’ll likely see your resting rate gradually drop as your heart becomes more efficient. A sudden increase that lasts several days, without an obvious cause like illness or stress, can be an early sign of overtraining, poor sleep, or an emerging infection. Some people notice their resting heart rate rises a day or two before cold symptoms appear.
The number that matters most is your personal baseline. Someone whose resting heart rate normally sits at 65 and suddenly starts waking up at 80 has a more useful signal than knowing they’re still “in range.” Consistency in when and how you measure makes these trends reliable.