What’s a Bad Resting Heart Rate and When to Worry?

A resting heart rate above 100 beats per minute or below 60 (without an obvious explanation like regular exercise) is generally considered outside the normal range for adults. But “bad” is more nuanced than a single cutoff. A rate in the 80s or 90s, while technically normal, carries measurably higher health risks over time compared to a rate in the 60s or 70s. Here’s how to interpret your number.

The Normal Range for Adults

For adults 18 and older, a normal resting heart rate falls between 60 and 100 beats per minute. That range comes from the American Heart Association and applies when you’re sitting quietly, not right after exercise, caffeine, or stress. Within that window, lower tends to be better. A resting rate in the low 60s or 70s typically signals an efficient heart that doesn’t have to work as hard to circulate blood.

Women tend to run about 5 to 10 beats per minute higher than men at rest. This is purely structural: the female heart is slightly smaller on average and pumps less blood per beat, so it compensates with a faster rhythm. That difference is normal and doesn’t indicate a problem.

Children Have Different Norms

If you’re checking a child’s pulse against the adult range, you’ll get a misleading answer. Kids’ hearts are smaller and beat faster. Newborns can have a resting rate anywhere from 100 to 205 bpm. By toddler age (1 to 3 years), the typical range is 98 to 140. School-age children (5 to 12) settle into 75 to 118 bpm, and by the teen years the range aligns with adults at 60 to 100.

When a High Heart Rate Is a Problem

A resting heart rate consistently above 100 bpm is called tachycardia. It means your heart is working harder than it should while you’re doing nothing, and it can signal problems ranging from dehydration and anxiety to thyroid disorders or heart rhythm abnormalities. Common symptoms include feeling your heart pounding, lightheadedness, shortness of breath, and weakness.

Even rates that stay within the “normal” range but sit on the higher end deserve attention. A large study that followed men for 16 years found that each 10 bpm increase in resting heart rate was linked to a 16% increase in the risk of dying from any cause. Compared to men whose resting rate was below 50, those with a rate between 81 and 90 had roughly double the mortality risk. Above 90 bpm, the risk tripled. These associations held even after accounting for fitness level and other health factors.

So while 95 bpm is technically “normal,” it’s not a number to ignore. A chronically elevated resting rate often reflects poor cardiovascular fitness, ongoing stress, or an underlying condition worth investigating.

When a Low Heart Rate Is a Problem

A resting heart rate below 60 bpm is called bradycardia, but it’s not automatically bad. Trained athletes and highly fit people commonly sit between 40 and 60 bpm because their hearts pump more blood per beat, so fewer beats are needed. The American Heart Association notes that athletes can go as low as 40 bpm without any concern. Rates in this range are also normal during sleep.

A low heart rate becomes a medical issue when the heart can’t pump enough oxygen-rich blood to the brain and body. Warning signs include dizziness or lightheadedness, fainting or near-fainting, unusual fatigue (especially with physical activity), confusion or memory problems, chest pain, and shortness of breath. If you’re not particularly active and your resting rate is consistently in the 40s or 50s with any of those symptoms, the slow rhythm may be the cause.

What Can Temporarily Skew Your Reading

Before you worry about a single measurement, consider what might be throwing it off. Your resting heart rate isn’t a fixed number. It shifts throughout the day and across seasons. Research from Scripps Research found that population-level resting heart rates peak in early January and drop to their lowest point at the end of July, likely driven by temperature and activity patterns.

On a day-to-day basis, infections can push your resting rate up noticeably, sometimes before you even feel sick. Asthma flare-ups, phases of the menstrual cycle, caffeine, dehydration, poor sleep, and stress all temporarily raise the number. For the most accurate reading, measure first thing in the morning before getting out of bed, on a day when you slept reasonably well and aren’t fighting off illness.

Medications That Change Your Resting Rate

If you take blood pressure or heart medication, your resting heart rate may sit well below 60 by design. Beta-blockers, one of the most commonly prescribed cardiovascular drug classes, work specifically by slowing the heart and reducing the force of each beat. They block the effect of adrenaline on your heart, which is why your pulse drops. A resting rate in the 50s or even high 40s on these medications is expected, not alarming, as long as you aren’t experiencing dizziness or fatigue. Other medications for heart rhythm disorders can have similar effects.

What Your Resting Heart Rate Tells You Over Time

A single reading matters less than the trend. If your resting heart rate has been creeping upward over months or years without an obvious explanation, that’s worth paying attention to. Conversely, if you start exercising regularly, you’ll likely see your resting rate drop as your heart becomes more efficient. A decline of 5 to 10 bpm over several months of consistent aerobic exercise is common and is one of the clearest signs that your cardiovascular fitness is improving.

The most practical way to use resting heart rate is as a personal baseline. Know your typical number. A sudden jump of 10 or more beats above your normal can be an early signal of illness, overtraining, stress, or dehydration, often before other symptoms appear. Fitness trackers make this easy to monitor, but a simple two-finger pulse check at your wrist for 30 seconds (then doubling the count) works just as well.