A resting heart rate below 60 beats per minute (bpm) is generally considered low for a woman. The average resting heart rate for adult women is 79 bpm, with the normal range spanning 60 to 100 bpm. Whether a heart rate below 60 is a problem or perfectly fine depends on your fitness level, medications, and whether you’re experiencing symptoms.
The 60 BPM Threshold and Why It’s Complicated
The standard clinical cutoff for a low heart rate, called bradycardia, is below 60 bpm. That number comes from the National Institutes of Health and applies to all adults, men and women alike. But it’s not quite that simple. The 2018 guidelines from the American College of Cardiology and American Heart Association actually use a lower number, below 50 bpm, when defining sinus node dysfunction, which is the type of slow heart rate that signals the heart’s electrical system isn’t working properly. Many population studies also use 50 bpm as their cutoff rather than 60.
So there’s a gray zone between 50 and 60 bpm where your heart rate is technically below the textbook “normal” range but may not indicate anything wrong. For women specifically, since the average resting rate sits around 79 bpm (slightly higher than men’s), a reading in the low 50s represents a bigger departure from the typical range than it would for a man. That doesn’t automatically make it dangerous, but it does mean it’s worth paying attention to.
When a Low Heart Rate Is Healthy
Fit women who exercise regularly often have resting heart rates well below 60 bpm. Very fit athletes can have rates closer to 40 bpm, and this is a sign of cardiovascular efficiency, not disease. When your heart is strong enough to pump more blood with each beat, it simply doesn’t need to beat as often at rest.
If your heart rate sits in the 50s or even the 40s and you feel fine, exercise regularly, and have no dizziness or fatigue, your low reading likely reflects good conditioning rather than a medical issue. The concern arises when a low heart rate shows up in someone who isn’t particularly active, or when it’s accompanied by symptoms.
Symptoms That Signal a Problem
A low heart rate becomes medically significant when your brain and body aren’t getting enough blood flow. The symptoms to watch for include:
- Dizziness or lightheadedness, especially when standing up
- Fainting or near-fainting episodes
- Unusual fatigue that doesn’t match your activity level
- Shortness of breath during activities that didn’t used to wind you
- Difficulty concentrating or feeling mentally foggy
If you’re experiencing any of these alongside a heart rate that regularly drops below 60 bpm, that combination points to bradycardia that needs evaluation. A low number alone, without symptoms, is less concerning.
Medical Causes in Women
Several conditions can slow your heart rate, and some are more common in women than men. An underactive thyroid (hypothyroidism) is one of the most frequent culprits and affects women at roughly five to eight times the rate it affects men. The thyroid controls your metabolism, and when it underperforms, your heart rate drops along with your energy levels.
Other medical causes include imbalances in potassium or calcium levels, inflammatory conditions like lupus or rheumatic fever, obstructive sleep apnea, and damage to heart tissue from aging, prior heart attacks, or congenital heart defects. In some cases, the heart’s natural pacemaker malfunctions and alternates between abnormally slow and fast rhythms, a pattern called bradycardia-tachycardia syndrome.
Medications That Lower Heart Rate
A number of commonly prescribed drugs can push your resting heart rate below 60 bpm. Blood pressure medications are the biggest category. Beta-blockers work by directly slowing the heart, and calcium channel blockers like diltiazem and verapamil have a similar effect. Even beta-blocker eye drops prescribed for glaucoma can lower heart rate systemically.
Beyond blood pressure drugs, certain antidepressants (particularly some SSRIs like citalopram and escitalopram), the heart rhythm drug amiodarone, digoxin, and sedatives can all contribute. If you started a new medication and noticed your heart rate dropping or new symptoms like fatigue and dizziness, the medication is a likely factor worth discussing with whoever prescribed it.
Heart Rate Fluctuations Through the Month
Women’s resting heart rates naturally fluctuate with the menstrual cycle. Heart rate tends to be lowest during the follicular phase (the first half of your cycle, starting with your period) and slightly higher during the luteal phase (the second half, after ovulation), when progesterone levels rise and body temperature increases. These shifts are typically small, around 2 to 5 bpm, but they can nudge a borderline reading below 60 on certain days. If you’re tracking your heart rate with a wearable device, comparing readings from the same phase of your cycle gives a more accurate picture than day-to-day comparisons.
During Pregnancy
Pregnancy changes the picture entirely. Your blood volume increases by nearly 50%, and the heart compensates by beating faster, not slower. A resting heart rate below 60 bpm during pregnancy is considered abnormal, since the typical trend is the opposite direction. Pregnant women who notice a persistently low heart rate should bring it up at their next prenatal visit, as the growing demands on the cardiovascular system mean the heart needs to pump more frequently to deliver blood to the placenta.
How to Get an Accurate Reading
Your resting heart rate should be measured after sitting or lying quietly for at least five minutes. Morning readings, before you get out of bed and before caffeine, give the most consistent results. Wearable devices are useful for spotting trends but can occasionally misread, so confirming with a manual pulse check is worthwhile if you’re getting unexpectedly low numbers. Place two fingers on the inside of your wrist just below the thumb, count beats for 30 seconds, and multiply by two.
A single reading below 60 bpm doesn’t mean much on its own. What matters is the pattern. If your resting heart rate consistently sits below 60 and you’re not a regular exerciser, or if it has dropped noticeably from where it used to be, that trend is more meaningful than any one measurement.