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Resting Heart Rate by Age: What's Normal and What Changes It
Quick Take
For most adults, a normal resting heart rate is 60–100 beats per minute (bpm). A well-trained athlete may rest at 40–60 bpm. Within the normal range, a lower rate generally reflects better cardiovascular fitness — but it is the trend over time, not a single reading, that matters most.
Your resting heart rate (RHR) — the number of times your heart beats per minute while you are awake, calm, and not moving — is one of the simplest windows into your cardiovascular health. You do not need a machine or a lab: two fingers, a clock, and one quiet minute will do it. The challenge is interpreting the number, because "normal" spans a wide range and shifts with age, fitness, and everyday factors.
This guide covers what counts as a normal resting heart rate at different ages, why a lower rate is usually a good sign, what temporarily or persistently pushes your rate up or down, how to measure it accurately, and the warning signs that mean it is time to talk to a clinician. To put your number in context alongside other cardiovascular markers, the Cardiovascular Risk Calculator and the Cardiovascular Health Metrics Ranges guide are useful companions.
What Counts as a Normal Resting Heart Rate?
Both the American Heart Association (AHA) and the Mayo Clinic define a normal resting heart rate for adults as 60 to 100 bpm. A well-trained athlete may have a resting rate as low as 40 bpm. The AHA notes that, when it comes to resting heart rate, lower is generally better: it usually means your heart muscle is in better condition and does not have to work as hard to keep a steady beat. Research also links a higher resting heart rate with lower physical fitness, higher blood pressure, and higher body weight.
Resting Heart Rate by Age
Resting heart rate stays in roughly the same 60–100 bpm window across adulthood. What changes steadily with age is your maximum heart rate — the fastest your heart can safely beat during intense exercise — which declines over time. A common estimate is 220 minus your age. (A newer formula, 208 minus 0.7 × age, is often cited as more accurate, especially for men.) Your target training zone is typically 50–85% of that maximum.
Children and infants have substantially faster resting rates that gradually fall toward the adult range through the teenage years. The ranges below are typical resting heart rates by age group:
| Age Group | Typical Resting Heart Rate (bpm) |
|---|---|
| Newborn (0–1 month) | 100–160 |
| Infants (1–11 months) | 90–150 |
| Toddlers (1–3 years) | 80–130 |
| Preschool (3–5 years) | 80–120 |
| School age (6–10 years) | 70–110 |
| Adolescents (11–14 years) | 60–105 |
| Adults (15+ years) | 60–100 |
Within adulthood, resting rate also differs slightly by sex: women's hearts are typically a bit smaller, so they often rest a few beats per minute higher than men of the same fitness level.
What Raises Your Resting Heart Rate
Your RHR is not fixed; it moves throughout the day in response to many inputs. Common factors that temporarily raise it include:
- Caffeine, nicotine, and alcohol
- Stress, anxiety, and strong emotions (via adrenaline)
- Fever and illness
- Dehydration, which lowers blood volume so the heart beats faster to compensate
- Hot or humid environments, which make the heart work harder to cool the body
- Certain medications, including some asthma inhalers and decongestants
- Electrolyte imbalances involving potassium, sodium, calcium, or magnesium
Consistently elevated resting rates are also associated with lower fitness, higher body weight, and poorer sleep quality over time.
What Lowers Your Resting Heart Rate
Regular aerobic exercise is the most reliable way to lower resting heart rate. Endurance training enlarges the heart's chambers and strengthens each contraction, so the heart pumps more blood per beat and needs fewer beats per minute to meet the body's needs. This is why a resting rate in the 40s or 50s is normal and healthy for a trained athlete, while the same number in a sedentary person would warrant evaluation.
Some blood pressure medications — particularly beta-blockers and calcium channel blockers — are specifically designed to slow the heart. If you take one and your resting rate sits in the 50s, that is usually the medication working as intended rather than a cause for concern.
How to Measure Your Resting Heart Rate
For the most reliable reading, check first thing in the morning before you get out of bed or have caffeine. Place your index and middle fingers on the inside of your wrist below the thumb (radial artery) or on the side of your neck, and count the beats for 30 seconds, then multiply by two. Avoid using your thumb, which has its own pulse. Because a single reading is just a snapshot, measure on several mornings and take the average to establish your personal baseline.
During deep sleep, heart rate normally drops about 20–30% below your waking resting rate, so overnight readings from wearables can look surprisingly low and are usually nothing to worry about.
When to See a Doctor
A resting rate above 100 bpm is called tachycardia; below 60 bpm is called bradycardia. Neither is automatically dangerous — tachycardia can simply mean you had too much coffee, and bradycardia is expected in fit athletes. But certain patterns deserve medical attention. The AHA and Mayo Clinic advise speaking with a clinician if:
- Your heart rate is regularly above 100 bpm and you are not a trained athlete
- Your resting rate is frequently below 60 bpm and you are not physically active
- An abnormal rate comes with dizziness, fainting, shortness of breath, or chest pain
If you notice a persistently fast, slow, or irregular rhythm alongside those symptoms, prompt evaluation is the right call. Otherwise, tracking your trend over weeks is the most useful habit — a steadily climbing resting rate can be an early signal to revisit sleep, stress, hydration, and fitness.