A healthy 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. Where you land within it depends on your fitness level, age, medications, and what’s happening in your body at that moment. Well-trained athletes often sit well below 60 bpm, and children run significantly faster than adults.
Resting Heart Rate for Adults
The 60 to 100 bpm window is the standard reference range, but most healthy adults at rest will measure somewhere in the 60s to 80s. A resting rate consistently at the higher end of that range isn’t necessarily a problem, but population studies have linked rates above 80 bpm at rest with a modestly higher risk of cardiovascular issues over time. Lower within the normal range is generally a sign of a more efficient heart.
Fitness is the biggest factor. When you exercise regularly, your heart muscle gets stronger and pumps more blood per beat. That means it doesn’t need to beat as often to keep up with your body’s demands. Endurance athletes commonly rest at 40 to 50 bpm. Miguel Indurain, the five-time Tour de France winner, famously had a resting heart rate of 28 bpm. Michael Phelps measured below 40. These are extreme examples, but they illustrate how much cardiovascular conditioning can shift the number downward.
If your resting rate regularly exceeds 100 bpm (a condition called tachycardia) or drops below 60 bpm without an athletic explanation, it’s worth a conversation with a doctor. A slow heart rate below 50 bpm can cause lightheadedness, dizziness, fainting, or unusual fatigue if the heart isn’t pumping enough blood to the brain.
Healthy Heart Rates for Children and Teens
Children’s hearts beat considerably faster than adults’, and the younger the child, the faster the rate. This is normal. A small heart holds less blood per beat, so it compensates with speed. Based on CDC survey data covering nearly a decade of measurements, here’s what typical resting rates look like by age:
- Infants (under 1 year): average 129 bpm, with a normal range of roughly 103 to 156
- 1 year: average 118 bpm (95 to 138)
- 2 to 3 years: average 107 bpm (86 to 124)
- 4 to 5 years: average 96 bpm (75 to 114)
- 6 to 8 years: average 87 bpm (68 to 105)
- 9 to 11 years: average 83 bpm (63 to 101)
- 12 to 15 years: average 78 bpm (58 to 98)
- 16 to 19 years: average 75 bpm (54 to 95)
By the late teenage years, heart rates settle close to adult values. The ranges listed here represent the 5th to 95th percentiles, meaning 90% of healthy kids fall within them.
What Affects Your Heart Rate
Your resting heart rate isn’t a fixed number. It shifts throughout the day and across weeks depending on several factors. Caffeine and nicotine are both stimulants that raise heart rate, sometimes noticeably. Cold medicines containing pseudoephedrine can do the same. On the other side, certain blood pressure medications are specifically designed to slow the heart down.
Stress and anxiety activate your fight-or-flight system, pushing your rate up even while you’re sitting still. Dehydration does too, because less fluid in your bloodstream means your heart has to work harder to circulate oxygen. Fever raises heart rate by roughly 10 bpm for each degree (Fahrenheit) of temperature increase. Even body position matters: lying down produces a slightly lower reading than sitting, which is lower than standing.
Sleep drops your heart rate to its lowest point. If you wear a fitness tracker overnight, you’ll typically see readings 10 to 20 bpm below your daytime resting rate. That overnight dip is a healthy sign that your nervous system is properly shifting into recovery mode.
How to Measure Your Heart Rate Accurately
The simplest method is pressing two fingers (index and middle, not thumb) against the inside of your wrist just below the base of your thumb. Count the beats for 30 seconds and multiply by two. Do this first thing in the morning before getting out of bed for the most consistent reading.
Wrist-worn fitness trackers are convenient but not perfect. Research on their accuracy found that while most wrist devices measure within 10% of the true value, more than 5% of individual readings were off by 20 bpm or more. Chest strap monitors are far more reliable, with near-perfect agreement with medical-grade equipment. Among wrist devices tested, Apple Watch showed the best accuracy, followed by Fitbit, with some brands performing notably worse. If you’re using a wrist tracker, treat it as a useful trend tool rather than a precise instrument, especially during exercise when wrist movement degrades the optical sensor’s accuracy.
Target Heart Rate During Exercise
Your maximum heart rate is the ceiling your heart can reach during all-out effort. The most commonly used estimate is 220 minus your age, but a more accurate formula, developed by researchers Tanaka, Monahan, and Seals, is 208 minus (0.7 times your age). The old formula overestimates max heart rate in younger people and underestimates it in older people. The two formulas converge around age 40.
For a 45-year-old, the updated formula gives a max of about 176 bpm. From that number, you can calculate training zones:
- Moderate intensity (50% to 70% of max): 88 to 123 bpm. This is a brisk walk, easy cycling, or light swimming. You can hold a conversation comfortably.
- Vigorous intensity (70% to 85% of max): 123 to 150 bpm. This covers running, fast cycling, or intense group fitness. Talking becomes difficult.
The American Heart Association recommends most adults aim for at least 150 minutes per week in the moderate zone or 75 minutes in the vigorous zone. You don’t need to hit exact numbers. If you can talk but not sing during exercise, you’re likely in the moderate range. If you can only say a few words before needing a breath, you’re in the vigorous range.
Heart Rate Variability: A Deeper Measure
Heart rate variability (HRV) measures the tiny fluctuations in timing between consecutive heartbeats. Even if your heart rate reads 70 bpm, the gap between individual beats isn’t perfectly uniform. Those micro-variations reflect how well your autonomic nervous system is adapting to moment-by-moment changes in your body.
Higher HRV is linked to better cardiovascular health, greater stress resilience, and higher fitness levels. Lower HRV tends to correlate with chronic stress, fatigue, and increased cardiovascular risk. Many fitness trackers now report HRV, typically measured during sleep. There’s no single “good” number because HRV varies enormously between individuals and decreases naturally with age. Your own trend over weeks and months is more meaningful than any single reading or comparison to someone else.
Signs Your Heart Rate Needs Attention
A resting heart rate that consistently sits above 100 bpm without an obvious explanation (like caffeine, stress, or fever) deserves investigation. The same goes for a rate persistently below 50 bpm if you’re not highly active. The number alone matters less than what accompanies it. Dizziness, fainting, unusual shortness of breath at rest, chest discomfort, or feeling like your heart is fluttering or skipping beats are all signals that the rate or rhythm may not be functioning properly.
Sudden dramatic changes also matter. If your resting heart rate jumps 15 to 20 bpm over a few days without a clear reason, your body may be fighting an infection, dealing with dehydration, or reacting to a new medication. Tracking your resting rate over time gives you a personal baseline, which makes it much easier to spot when something shifts.