Your heart rate changes constantly throughout the day. It speeds up when you walk up stairs and slows down when you sit still. A normal resting heart rate for most adults is between 60 and 100 beats per minute (bpm). But many healthy people have rates below 60, especially athletes. The number on your smartwatch is just one piece of a bigger picture about your heart health.
What Is a Normal Resting Heart Rate by Age?
Resting heart rate changes as you get older. For adults aged 18 and over, the standard range is 60 to 100 bpm. Children naturally have faster heart rates. A newborn may have a resting rate between 100 and 160 bpm. By age 10, that usually drops to 70 to 110 bpm.
For older adults, the range stays similar to younger adults. The American Heart Association states that 60 to 100 bpm is the normal range for adults over 18, regardless of age. However, some research suggests that very fit older adults may have resting rates in the 40s or 50s without any health problems.
Your resting heart rate tends to increase slightly with age if you become less active. But being physically active can keep your resting rate low even into your 70s and 80s. The number matters less than the trend over time.
How Do You Measure Your Resting Heart Rate Accurately?
Measuring your resting heart rate is simple but timing matters. Take it first thing in the morning before you get out of bed. Do not measure after coffee, exercise, or a stressful conversation. Those things raise your heart rate temporarily.
Place your index and middle fingers on your wrist below the base of your thumb. Count the beats for 30 seconds and multiply by two. Or count for a full 60 seconds for the most accurate number. Smartwatches and fitness trackers can also measure it, but they are not always perfectly accurate.
For the most reliable reading, take your pulse at the same time each morning for several days. Average those numbers together. A single high reading from a stressful morning is not a cause for concern.
What Does a High Resting Heart Rate Mean?
A resting heart rate consistently above 100 bpm is called tachycardia. This can be a normal response to stress, fever, or dehydration. But if your rate stays high when you are calm and resting, it is worth discussing with your doctor.
Research published in the journal Heart found that a resting heart rate above 80 bpm is linked to a higher risk of cardiovascular disease. Another large study in the New England Journal of Medicine showed that people with resting rates above 90 bpm had a significantly higher risk of death from heart disease compared to those with rates below 60 bpm.
Common causes of a high resting heart rate include:
- Anxiety or chronic stress
- Dehydration or electrolyte imbalances
- Anemia or thyroid problems
- Too much caffeine or alcohol
- Lack of regular exercise
- Certain medications like decongestants
A single high reading is not dangerous. But a pattern of high readings over weeks or months deserves attention. Your doctor can check for underlying causes with simple blood tests and an electrocardiogram (EKG).
What Does a Low Resting Heart Rate Mean?
A resting heart rate below 60 bpm is called bradycardia. For many people, especially athletes and people who exercise regularly, this is a sign of good health. A well-conditioned heart pumps more blood per beat, so it does not need to beat as often.
Elite endurance athletes often have resting rates in the 40s. The cyclist Miguel Indurain reportedly had a resting heart rate of 28 bpm during his prime. That is extreme and not typical, but it shows how low a healthy heart rate can go.
Low heart rate becomes a problem only when it causes symptoms. If your heart rate drops below 50 bpm and you feel dizzy, tired, short of breath, or like you might faint, that is a concern. This can indicate problems with the heart’s electrical system, an underactive thyroid, or certain medications like beta-blockers.
What Factors Can Change Your Heart Rate Day to Day?
Your heart rate is not a fixed number. It changes based on what you do and how you feel. Here are common factors that can raise or lower your heart rate temporarily:
| Factor | Effect on Heart Rate |
|---|---|
| Exercise | Raises it — can go to 150-200 bpm during intense activity |
| Stress or anxiety | Raises it by 10-30 bpm |
| Caffeine | Raises it by 5-15 bpm for a few hours |
| Dehydration | Raises it by 10-20 bpm |
| Sleep | Lowers it — often drops 10-20 bpm below daytime resting rate |
| Fever | Raises it — about 10 bpm for each degree Fahrenheit |
| Medications | Can raise or lower it depending on the drug |
Your heart rate also changes with body position. Standing up can raise it by 10 to 15 bpm compared to lying down. Eating a large meal can raise it slightly as your body directs blood to digestion. These normal fluctuations are not a sign of trouble.
Hormones also play a role. Women may notice their resting heart rate rises slightly during the second half of their menstrual cycle. Pregnancy naturally increases heart rate by 10 to 20 bpm as the body supports the growing baby.
When Should You Worry About Your Heart Rate?
Most heart rate changes are normal. But some patterns should prompt a call to your doctor. If your resting heart rate is consistently above 100 bpm or below 50 bpm and you have symptoms, get checked.
Symptoms that matter include chest pain, shortness of breath, dizziness, fainting, or feeling like your heart is racing or skipping beats. If your heart rate suddenly jumps to over 150 bpm while at rest and does not come down within a few minutes, seek medical attention.
An irregular heartbeat is different from a fast or slow one. If your pulse feels like it skips beats or has an uneven rhythm, that could be atrial fibrillation. The CDC estimates that about 12 million Americans will have atrial fibrillation by 2030. This condition increases stroke risk and often has no symptoms other than an irregular pulse.
Do not rely on your smartwatch alone to diagnose heart problems. These devices can detect some irregularities, but they also give false alarms. If your watch says something is wrong, check your pulse manually and call your doctor if you are concerned.
How Can You Improve Your Resting Heart Rate?
If your resting heart rate is on the higher end of normal and you want to lower it, lifestyle changes can help. The most effective approach is regular aerobic exercise. The American Heart Association recommends at least 150 minutes of moderate-intensity exercise per week.
Moderate exercise means you can talk but not sing. Brisk walking, cycling, swimming, or jogging all count. Over several months, consistent exercise can lower your resting heart rate by 5 to 20 bpm as your heart becomes stronger and more efficient.
Other strategies that research supports include:
- Staying well-hydrated throughout the day
- Limiting caffeine to morning hours only
- Getting 7 to 9 hours of quality sleep each night
- Managing stress with deep breathing or meditation
- Avoiding smoking and limiting alcohol
Some people report that deep breathing exercises can lower heart rate by 5 to 10 bpm within minutes. This is widely claimed, but strong evidence is limited to small studies. It is safe to try and may help with stress, but do not expect dramatic long-term changes from breathing alone.
If you take medications that affect your heart rate, never stop or change them without talking to your doctor. Beta-blockers and calcium channel blockers are prescribed for good reasons, and your resting heart rate while on them is expected to be lower.
Frequently Asked Questions
What is a normal BPM for a woman?
Women typically have resting heart rates 3 to 7 bpm higher than men of the same age. A normal range for women is still 60 to 100 bpm.
Is a heart rate of 55 BPM normal?
Yes, especially if you are physically active. A rate of 55 bpm is common in athletes and people who exercise regularly. It is only concerning if you have symptoms like dizziness or fatigue.
What BPM is a heart attack?
There is no specific BPM that signals a heart attack. Your heart rate may be fast, slow, or normal during a heart attack. Watch for chest pain, shortness of breath, and nausea instead.
Can stress cause a high resting heart rate?
Yes, chronic stress can keep your resting heart rate elevated by 10 to 30 bpm. Managing stress through exercise, sleep, and relaxation techniques can help bring it down.
