How to Measure Your Resting Heart Rate

You wake up, check your pulse, and get a number. But was it measured correctly? The most common mistake is taking your resting heart rate after you have already moved, stretched, or thought about coffee. A valid reading requires a specific protocol. Measure it first thing in the morning, before you get out of bed, after a full night of uninterrupted sleep. Lie flat on your back. Use your index and middle fingers to find your pulse at your neck (carotid artery) or wrist (radial artery). Count the beats for 60 seconds. Do not count for 15 seconds and multiply by four; that magnifies any counting error. Do this for three consecutive mornings and average the three numbers. A single day's reading can be off by 10 bpm or more due to poor sleep or hydration changes. The American Heart Association (AHA) defines a normal resting heart rate as 60 to 100 beats per minute (bpm). The Mayo Clinic gives the same range (60-100 bpm) and notes that resting heart rate varies with fitness level, age, medication, air temperature, emotions, body position, and body size.

A resting heart rate of 60 to 100 bpm is normal for adults. That is the official range from the AHA and Mayo Clinic, not a narrower 60-80 bpm that some sources claim. A rate of 95 bpm is within normal range, not a problem. A rate of 45 bpm is low for most people, but is not automatically dangerous. Low resting heart rate is common in endurance athletes whose hearts have adapted to pump more blood per beat. A very high resting heart rate, consistently above 100 bpm, is called tachycardia and warrants a medical check. The key is consistency: a single high result after a poor night or a stressful day is not a diagnosis.

Resting Heart Rate by Age

Resting heart rate tends to rise slightly with age, but there is no fixed "normal by age" table that applies to everyone. The range of 60-100 bpm covers all adult ages. A 70-year-old with a resting heart rate of 75 bpm is within normal range. A 25-year-old with a resting heart rate of 95 bpm is also within normal range. The variation between individuals of the same age is larger than the variation caused by age itself. What matters more is whether your number changes significantly from your own baseline. A resting heart rate that jumps 15 bpm over a few days and stays there is a signal worth investigating.

A low resting heart rate, 40 to 60 bpm, is common in trained endurance athletes. This is not a sign of illness; it is the result of a larger left ventricle that pumps more blood with each contraction, so fewer beats are needed at rest. This adaptation takes months or years of consistent aerobic training. It does not happen from casual jogging. If you are not an athlete and your resting heart rate is below 50 bpm, see a doctor to rule out heart block or other conduction issues. Do not assume a low number is automatically good. The body's electrical system is complex, and a low rate can be a sign of a failing sinus node or other arrhythmia. A resting heart rate of 48 bpm in a sedentary 50-year-old is not the same as 48 bpm in a 50-year-old marathon runner. The context of your training history matters.

1. Set an alarm for your normal wake time. Do not get up.
2. Keep your phone and alarm clock out of arm's reach so you do not move to turn them off.
3. Lie flat on your back with your head on a pillow, arms at your sides.
4. Place your index and middle fingers on your wrist or neck until you feel a strong pulse.
5. Count the beats for a full 60 seconds. Use a clock or timer you can see without lifting your head.
6. Record the number. Repeat for two more mornings.
7. Average the three readings. That is your resting heart rate.

Do not measure after caffeine, alcohol, a stressful conversation, or any activity that raises your heart rate. Do not measure while sitting up or standing. Do not use an optical wrist monitor for this measurement; they are less accurate at low heart rates and can be off by 5-10 bpm. A chest strap heart rate monitor is more reliable if you prefer a device. The Mayo Clinic specifically notes that body position affects the result, which is why lying flat is the standard. If you cannot measure before getting up, wait at least 15 minutes of complete rest after waking, still in bed, without any movement.

Resting heart rate is not a fixed number. It changes day to day based on several factors. Caffeine can raise it by 5-10 bpm for several hours. Poor sleep, especially less than six hours, can raise it by 3-8 bpm the next morning. Illness, even a mild cold or low-grade fever, can push it up 10-15 bpm. Heat and dehydration increase heart rate because the heart works harder to cool the body. Emotional stress, whether from work, an argument, or anxiety, raises it through the release of adrenaline and cortisol. Body size and composition also affect resting heart rate; larger bodies require more blood volume, which increases the resting rate. Medications, especially decongestants containing pseudoephedrine, can raise it. Beta-blockers do the opposite: they lower resting heart rate and make all heart-rate-based targets invalid. If you take a beta-blocker, do not use any target heart rate formula. Use the Rating of Perceived Exertion (RPE) scale instead. The Borg RPE scale (6-20) is the validated tool for this.

Your resting heart rate is the baseline for the Karvonen formula, also called the heart rate reserve (HRR) method. That formula is: Target HR = ((Max HR - Resting HR) × %Intensity) + Resting HR. This method accounts for your individual resting rate, so two people with the same max HR but different resting HRs will get different targets. The simpler percent of max heart rate (%MHR) method uses only max HR, which ignores your baseline. The difference matters. For example, a 40-year-old with a max HR of 180 bpm (using the Tanaka formula: 208-0.7 × 40 = 180) wants to train at 70% intensity. The %MHR method gives 126 bpm (180 × 0.70). The Karvonen method, with a resting HR of 65 bpm, gives (180-65) × 0.70 + 65 = 145.5 bpm. That is a 19.5 bpm difference, two entirely different training intensities. The Karvonen method is more individualized because it uses your actual heart rate reserve. But it still depends on an estimated max HR, which carries its own error. The standard deviation of the 220, age formula is about 12 bpm, meaning two people of the same age can have true max HRs 24 bpm apart.

The table below compares the two methods for a 40-year-old person across different resting heart rates. The max HR is estimated using the Tanaka formula (208-0.7 × 40 = 180 bpm). The %MHR target stays the same regardless of resting HR. The Karvonen target changes by 7 bpm for every 10 bpm change in resting HR.

See a doctor if your resting heart rate is consistently above 100 bpm (tachycardia) or below 50 bpm (bradycardia) and you are not an endurance athlete. See a doctor if your resting heart rate changes by more than 15 bpm from your baseline and stays there for more than two weeks. See a doctor if you experience symptoms with a high or low reading, dizziness, fainting, chest pain, shortness of breath, or palpitations. Resting heart rate alone is not a diagnostic tool, but a sudden or extreme shift is a signal worth checking. If you have a known cardiac arrhythmia such as atrial fibrillation, do not use pulse counting or any heart-rate-based target. Use the RPE scale exclusively. If you take rate-altering medications beyond beta-blockers, such as some calcium channel blockers, the same rule applies: skip HR targets and use RPE. The AHA and Mayo Clinic guidance is clear: a normal resting heart rate is 60-100 bpm, but individual variation is wide, and the context of your overall health matters more than the number itself.

Knowing your resting heart rate suits anyone starting a cardio program for health or weight loss. It gives you a baseline for calculating training zones and tracking fitness improvements. It also suits runners and cyclists who use heart rate to monitor intensity, even if they know that HR-based zones lag behind effort by 30-90 seconds and are affected by heat and caffeine. The honest version is that these numbers are population averages with wide individual variation, not personal prescriptions. Older adults and people on beta-blockers should skip heart-rate-based targets entirely and use the RPE scale instead. Pregnant individuals should follow ACOG and the 2019 Canadian Guideline, which recommend moderate intensity using RPE, not a specific heart rate number. Anyone looking for a precise calorie-burn figure from heart rate should go to a metabolic testing lab, not a calculator. The single thing that most often goes wrong: measuring your resting heart rate once, from a sitting position, after you have already had coffee, and believing that number is your true baseline. It is not.