A normal resting pulse for adults is 60 to 100 beats per minute (bpm). Children and infants run significantly higher, and well-trained athletes often sit well below that range. Your actual number depends on your age, fitness level, medications, and even whether you’re standing or lying down.
Normal Resting Pulse by Age
Heart rate slows steadily from birth through adolescence, then holds relatively stable through adulthood. Here are the typical resting ranges:
- Newborn (birth to 4 weeks): 100 to 205 bpm
- Infant (4 weeks to 1 year): 100 to 180 bpm
- Toddler (1 to 3 years): 98 to 140 bpm
- Preschool (3 to 5 years): 80 to 120 bpm
- School age (5 to 12 years): 75 to 118 bpm
- Adolescent (13 to 17 years): 60 to 100 bpm
- Adult (18 and older): 60 to 100 bpm
These numbers apply when you’re awake and at rest. Your pulse will be lower during sleep and higher during physical activity or stress. A child’s heart is smaller and pumps less blood per beat, which is why it needs to beat faster to keep up with the body’s demands. By the teenage years, the heart has grown enough that the resting rate settles into the adult range.
What Happens During Sleep
Your sleeping heart rate typically drops 20% to 30% below your daytime resting rate. For a healthy adult, that translates to roughly 50 to 75 bpm overnight. Anything between 40 and 100 bpm during sleep is generally considered within normal limits. If you wear a fitness tracker and notice your pulse dipping into the low 50s or high 40s at night, that’s usually just your body in its most relaxed state, not a sign of trouble.
Why Athletes Have Lower Pulse Rates
Endurance training physically enlarges the heart’s main pumping chamber, allowing it to push more blood with each beat. Because each contraction delivers more oxygen to the body, the heart doesn’t need to beat as often. Elite endurance athletes commonly have resting rates in the 40s, and some sit in the high 30s. A pulse below 60 bpm in a fit, healthy person is normal and actually reflects a more efficient cardiovascular system.
If you’re not particularly active and your resting pulse is below 60, that’s a different story. A rate under 60 in a sedentary adult is clinically classified as bradycardia. It isn’t always dangerous, but it can cause fatigue, dizziness, or lightheadedness if the heart isn’t pumping enough blood to meet the body’s needs.
When a Pulse Is Too Fast or Too Slow
Doctors use two key thresholds for adults at rest. A sustained rate below 60 bpm is considered bradycardia, and a sustained rate above 100 bpm is considered tachycardia. Both are defined by the number alone, but context matters. A pulse of 55 in a regular runner is healthy. A pulse of 110 after climbing a flight of stairs is expected and temporary.
The concern starts when an unusual rate comes with symptoms: chest pain, shortness of breath, fainting, or prolonged dizziness. A heart that races above 120 bpm while you’re sitting still, or one that stays in the 40s and leaves you feeling faint, signals that something beyond normal variation is going on.
Factors That Shift Your Resting Rate
Your pulse is not a fixed number. It responds to dozens of influences throughout the day. The most common ones include:
- Caffeine and nicotine: Both are stimulants that temporarily raise heart rate.
- Stress and emotions: Anxiety, fear, and even excitement trigger adrenaline release, which speeds the heart.
- Medications: Beta-blockers lower your pulse. Decongestants, some asthma medications, and thyroid drugs can raise it.
- Body position: Standing up increases your rate compared to sitting or lying down, because your heart works harder against gravity.
- Temperature: Heat and humidity make the heart beat faster to help cool the body.
- Sleep quality: Poor or fragmented sleep is linked to a higher daytime resting rate over time.
- Chronic conditions: Diabetes, high cholesterol, and cardiovascular disease all influence baseline heart rate.
Because so many variables are at play, a single reading doesn’t tell you much. Tracking your resting pulse at the same time each day, ideally first thing in the morning before getting out of bed, gives you a much more reliable picture of your baseline.
How to Measure Your Pulse Accurately
The two easiest spots to feel your pulse are the inside of your wrist (just below the base of your thumb) and the side of your neck (in the soft groove next to your windpipe). Place two fingertips, not your thumb, on the spot. Your thumb has its own pulse and can throw off the count.
For the most accurate result, count the beats for a full 60 seconds. A common shortcut is counting for 15 seconds and multiplying by four, but this amplifies any counting errors. If you miscounted by just one beat in 15 seconds, you’re off by four beats in your final number. The full 60-second count is worth the extra time, especially if you’re tracking trends or concerned about an irregular rhythm.
Smartwatches and fitness trackers use optical sensors to estimate your pulse continuously. They’re reasonably accurate for resting and sleeping rates but can struggle during intense exercise or if the band is too loose. If you notice an unusual reading on a wearable device, confirming it with a manual check is a good habit.
Your Pulse During Exercise
During a workout, your heart rate should climb well above your resting number. A simple formula gives you a rough ceiling: subtract your age from 220. That’s your estimated maximum heart rate. For a 40-year-old, that’s about 180 bpm.
Moderate-intensity exercise, like brisk walking or a casual bike ride, typically puts you at 50% to 70% of that maximum. Vigorous exercise, like running or high-intensity interval training, pushes you to 70% to 85%. For that same 40-year-old, moderate effort means a pulse of roughly 90 to 126 bpm, and vigorous effort means about 126 to 153 bpm.
These are guidelines, not hard rules. Some medications cap how high your heart rate can go, and individual variation is wide. The more useful signal during exercise is how you feel: at moderate intensity, you can talk but not sing. At vigorous intensity, you can only get out a few words before needing a breath.