A resting heart rate of 57 beats per minute is a good sign. It falls just below the standard “normal” range of 60 to 100 bpm, but for most people, a heart rate in the upper 50s reflects a heart that pumps blood efficiently without working overtime. In a large 16-year study of men published in the BMJ journal Heart, those with resting heart rates at or below 50 bpm had the lowest mortality risk of any group, and each 10 bpm increase above that raised the risk of death by about 16%. At 57 bpm, you’re sitting very close to that optimal zone.
Why 57 BPM Is Below “Normal” but Not a Problem
The commonly cited normal range of 60 to 100 bpm is a broad guideline, not a target. It captures the majority of the adult population, but it doesn’t mean 59 or 57 is unhealthy. In fact, the upper end of that range is far more concerning than the lower end. In the Copenhagen Male Study, men with resting heart rates between 81 and 90 bpm had roughly double the mortality risk compared to those below 50 bpm, and rates above 90 bpm tripled the risk. A heart rate of 57 puts you well on the favorable side of that curve.
Clinically, a slow heart rate (bradycardia) only becomes a medical concern when it drops low enough to starve the brain and organs of oxygen. The American Heart Association uses a threshold of roughly 50 bpm or below when evaluating bradycardia that may need treatment. Even then, the number alone doesn’t determine whether there’s a problem. What matters is whether symptoms come with it.
What Makes a Heart Beat Slower
The most common reason for a resting heart rate in the 50s is cardiovascular fitness. When you exercise regularly, especially with endurance activities like running, cycling, or swimming, your heart’s left ventricle gradually gets larger and develops thicker walls. This bigger, stronger chamber can push out more blood with each beat. At rest, when your body’s demands are low, that stronger heart doesn’t need to beat as often to circulate the same amount of blood. It’s doing the same job with fewer contractions.
This adaptation is sometimes called athlete’s heart, though you don’t need to be an elite athlete to develop it. Consistent moderate exercise over months or years can lower your resting rate into the 50s. Very fit endurance athletes often have resting heart rates closer to 40 bpm. Genetics also play a role. Some people naturally have slower heart rates without any particular exercise habit, and that’s typically harmless as long as they feel fine.
When a Low Heart Rate Is a Concern
A resting heart rate of 57 bpm is only worth investigating if it comes with symptoms that suggest your heart isn’t delivering enough blood. Those symptoms include:
- Dizziness or lightheadedness
- Fainting or near-fainting
- Unusual fatigue, especially during physical activity
- Shortness of breath
- Chest pain
- Confusion or memory problems
If you have none of these, a heart rate of 57 is almost certainly a sign of a healthy, efficient heart rather than something going wrong. If you do experience any of these regularly, the heart rate is worth mentioning to a doctor, but the symptoms themselves are the red flag, not the number.
How to Measure Your Resting Heart Rate Accurately
The number on your wrist or fitness tracker can vary quite a bit depending on when and how you check it. For the most reliable reading, Harvard Health recommends a few specific steps. First, avoid measuring within one to two hours of exercise or a stressful event. Wait at least an hour after drinking caffeine, which can temporarily raise your rate. Don’t take the reading after sitting or standing in one position for a long time.
The simplest manual method: place two fingers on the inside of your wrist just below the base of your thumb, count the beats for 15 seconds, and multiply by four. Repeating this a few times and averaging the results gives you a more accurate number. First thing in the morning, before getting out of bed, tends to produce the most consistent readings because your body is in its most relaxed state.
What Your Heart Rate Tells You Over Time
A single reading of 57 bpm is useful, but tracking your resting heart rate over weeks and months gives you much richer information. A gradually declining resting rate usually means your cardiovascular fitness is improving. A sudden or sustained increase of 5 to 10 bpm from your personal baseline, on the other hand, can signal overtraining, poor sleep, illness, dehydration, or elevated stress. The trend matters more than any individual number.
The Copenhagen study’s finding that mortality risk climbed steadily with each 10 bpm increase held true for both smokers and nonsmokers, though the effect was slightly stronger in smokers (20% increased risk per 10 bpm vs. 14% in nonsmokers). This suggests that resting heart rate reflects overall cardiovascular health in a way that’s somewhat independent of other risk factors. Keeping your rate in the lower range through regular exercise is one of the more straightforward things you can do for long-term heart health.
At 57 bpm, your heart is working efficiently. Unless symptoms suggest otherwise, it’s a number most cardiologists would be happy to see.