A normal resting heart rate for adults falls between 60 and 100 beats per minute (bpm). That range applies when you’re awake, calm, and sitting still. Your actual number within that window depends on your fitness level, age, medications, and even the time of day.
Resting Heart Rate for Adults
The 60 to 100 bpm range is the standard benchmark used in clinical medicine. Most healthy adults land somewhere in the middle, though where you personally sit tells you something useful. A resting rate consistently on the lower end often reflects better cardiovascular fitness, because a stronger heart pumps more blood per beat and doesn’t need to work as hard at rest.
Well-trained endurance athletes routinely have resting rates in the 40s or even 30s. A study of 465 endurance athletes published in the American Heart Association’s journal Circulation found that 38% had heart rates at or below 40 bpm on a 24-hour monitor. Only about 2% dipped to 30 bpm or below. For athletes without symptoms like dizziness or fainting, current guidelines from the American College of Cardiology say reassurance is appropriate for any degree of low heart rate, though rates below 30 bpm may warrant further evaluation regardless of symptoms.
On the other end, a resting heart rate consistently at or above 100 bpm is classified as tachycardia. That doesn’t automatically mean something is wrong. Caffeine, anxiety, dehydration, or a fever can all push your rate above 100 temporarily. But a persistently elevated resting rate is worth investigating.
Normal Heart Rate by Age in Children
Children’s hearts beat faster than adults’, and the younger the child, the faster the rate. Here’s what’s considered normal 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, children’s heart rates drop considerably. A sleeping newborn might range from 80 to 160 bpm, while a sleeping child aged 2 to 10 typically runs between 60 and 90 bpm. These wide ranges are normal because a child’s heart rate responds dramatically to crying, feeding, fever, and activity.
Your Heart Rate During Sleep
Your heart rate drops roughly 20% to 30% below your daytime resting rate while you sleep. For most adults, that translates to about 50 to 75 bpm overnight. The lowest point typically occurs during deep sleep, when your body is doing its most restorative work, blood pressure dips, and your heart doesn’t need to pump as aggressively.
During REM sleep (when you dream), your heart rate climbs back up and becomes more variable, sometimes approaching waking levels. If you use a wearable device to track overnight heart rate, you’ll likely see a pattern of valleys during deep sleep and small peaks during REM cycles. A consistently elevated sleeping heart rate over days or weeks can signal stress, illness, or poor recovery from exercise.
What Affects Your Resting Heart Rate
Fitness is the single biggest modifiable factor. Aerobic exercise strengthens the heart muscle over time, allowing it to pump a greater volume of blood with each contraction. That means fewer beats are needed per minute to circulate the same amount of blood, and your resting rate gradually drops.
Several other factors shift your number in predictable ways:
- Medications: Beta-blockers, one of the most commonly prescribed heart medications, work by blocking stress hormones that speed up your heart. They deliberately slow your heart rate and are often the reason someone’s resting rate sits well below 60. Stimulant medications, decongestants, and some asthma inhalers can push your rate higher.
- Temperature and hydration: Heat and dehydration both force your heart to work harder, bumping your rate up by 5 to 10 bpm or more.
- Stress and emotions: Anxiety, fear, and even excitement trigger a surge of adrenaline that raises your heart rate. This is completely normal, but chronic stress can keep your baseline elevated.
- Body position: Standing increases your heart rate compared to sitting or lying down, because your heart has to work against gravity to circulate blood.
- Caffeine and nicotine: Both are stimulants that temporarily raise heart rate.
How to Measure Your Heart Rate Accurately
The simplest method requires two fingers and a clock. Place the tips of your index and middle fingers on the inside of your wrist, in the groove between the bone and the tendon on the thumb side. You should feel a pulse almost immediately. Alternatively, place those same two fingers in the groove next to your windpipe on either side of your neck to find your carotid pulse.
For the most accurate reading, 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 error. If you miscount by just one beat in 15 seconds, your final number is off by four.
To get a true resting measurement, sit quietly for at least five minutes before checking. Don’t measure right after climbing stairs, drinking coffee, or having a stressful conversation. First thing in the morning, before getting out of bed, gives you the most consistent baseline from day to day.
Maximum Heart Rate During Exercise
Your maximum heart rate is the upper limit of what your cardiovascular system can handle during intense exertion. The classic formula for estimating it is 220 minus your age, but research has shown this tends to underestimate the maximum for older adults. A more accurate formula, developed from a meta-analysis of 351 studies, is 208 minus 0.7 times your age. For a 50-year-old, that’s 173 bpm instead of the 170 the older formula would give. The gap widens with age.
These formulas provide estimates, not exact numbers. Individual variation is significant, with some people’s true maximum falling 10 to 15 bpm above or below the prediction. If you exercise using heart rate zones, the formulas give you a reasonable starting point, but paying attention to how your body feels at different intensities is just as informative.
When a Heart Rate Is Too High or Too Low
A resting rate above 100 bpm (tachycardia) that persists when you’re calm and hydrated deserves attention. Common causes include thyroid disorders, anemia, infections, and heart rhythm abnormalities. Temporary spikes from exercise, caffeine, or stress are not tachycardia in any meaningful sense.
A resting rate below 60 bpm (bradycardia) is often perfectly healthy, especially if you’re physically active. It becomes a concern when it’s accompanied by symptoms: dizziness, fatigue, fainting, or shortness of breath with minimal exertion. These symptoms suggest your heart isn’t pumping enough blood to meet your body’s needs, even though the rate itself might look only mildly low on paper.
The number alone doesn’t tell the whole story. A resting rate of 55 in a recreational runner is a sign of good fitness. The same rate in someone on multiple heart medications who feels lightheaded is a different situation entirely. Context matters more than the specific number on any single measurement.