A good resting heart rate for most trained athletes falls between 40 and 60 beats per minute (bpm), well below the 70 to 75 bpm typical of the general population. Elite endurance athletes can drop even further, into the upper 30s. The exact number depends on your sport, training history, age, and sex.
Typical Ranges by Age and Sex
Resting heart rate in athletes isn’t one fixed number. It shifts with age and tends to run a few beats higher in women than in men. Here are the ranges generally seen in trained athletes:
Men:
- Ages 18–25: 40–52 bpm
- Ages 26–35: 44–50 bpm
- Ages 36–45: 47–53 bpm
- Ages 46–55: 49–54 bpm
- Ages 56–65: 51–56 bpm
- Ages 65+: 52–55 bpm
Women:
- Ages 18–25: 40–48 bpm
- Ages 26–35: 42–46 bpm
- Ages 36–45: 45–49 bpm
- Ages 46–55: 48–54 bpm
- Ages 56–65: 50–55 bpm
- Ages 65+: 52–55 bpm
On average, women’s resting heart rate runs about 2 to 7 bpm higher than men’s. The gap between male and female athletes narrows with age, and by 65 the ranges are essentially identical. Young athletes in their late teens and twenties tend to have the lowest readings, with a gradual upward drift over the decades.
Why Athletes Have Slower Heart Rates
A low resting heart rate in a trained athlete isn’t a sign that something is wrong. It’s a measurable adaptation to consistent training. Three things control your heart’s rhythm: the parasympathetic (vagal) nerves that slow it down, the sympathetic nerves that speed it up, and the pacemaker cells that set an intrinsic baseline rate. In trained athletes, the vagal nerve’s braking influence on the heart becomes stronger, which is the primary driver of a slower resting pulse.
There’s also a change at the cellular level. The pacemaker cells themselves slow down their natural firing rate over time with training. So trained hearts beat slower both because the nervous system tells them to and because the cells generating each beat have physically adapted. On top of that, a well-trained heart pumps more blood per beat (greater stroke volume), meaning it simply doesn’t need to beat as often to deliver the same amount of oxygen to your body.
How Training Type Affects Your Resting Rate
Not all exercise lowers resting heart rate equally. A large meta-analysis covering thousands of participants found that endurance training produces the biggest drop, roughly a 6% decrease from baseline. For someone starting at around 72 bpm, that translates to about a 4 to 5 bpm reduction. Combined endurance and strength training produced about a 4.8% decrease, while pure strength training yielded a smaller drop of around 2.5%.
The practical takeaway: if you’re a runner, cyclist, swimmer, or rower, your resting heart rate will typically be lower than someone who primarily lifts weights. Strength training alone showed significant heart rate reductions in women but not in men in randomized controlled trials, suggesting the effect may vary by sex. This doesn’t mean powerlifters or bodybuilders can’t have low resting heart rates, but the aerobic component of training is what drives the biggest changes.
When a Low Heart Rate Needs Attention
The American Heart Association considers asymptomatic sinus bradycardia (a slow heart rate at or above 30 bpm while awake) a normal adaptation in athletes. It does not require clinical evaluation on its own. The threshold for concern is a resting heart rate below 30 bpm while awake, or any slow heart rate accompanied by symptoms like dizziness, fainting, unusual fatigue, or shortness of breath.
So if your wearable shows 38 bpm first thing in the morning and you feel fine, that’s within the expected range for a well-trained endurance athlete. If it drops below 30, or if you’re experiencing lightheadedness or passing out, that warrants medical evaluation before continuing competitive sports.
What a Rising Resting Heart Rate Can Tell You
Your resting heart rate isn’t just a fitness badge. Tracking it over time can flag problems before you feel them. After a hard training session, your resting heart rate typically rises slightly for 24 to 48 hours as your body recovers, reflecting a temporary shift toward sympathetic (fight-or-flight) nervous system dominance. That’s normal.
What isn’t normal is a resting heart rate that stays elevated for days or weeks. In overtraining syndrome, the body’s recovery systems break down from excessive training without adequate rest. In advanced stages, resting heart rate can climb above 100 bpm, a condition called tachycardia. Long before it gets that extreme, a sustained increase of even a few beats per minute above your personal baseline can signal that you need more recovery. The smallest meaningful change in resting heart rate is about 2%, so for an athlete sitting at 50 bpm, a consistent jump of just 1 to 2 bpm is worth paying attention to.
Resting Heart Rate vs. Heart Rate Variability
Many athletes now track heart rate variability (HRV) alongside resting heart rate. While both reflect the balance between your parasympathetic and sympathetic nervous systems, they capture slightly different things. HRV measures the variation in time between individual heartbeats, and it tends to be a more sensitive indicator of day-to-day stress, including training load, poor sleep, illness, and psychological stress.
Resting heart rate is more stable and gives you a reliable long-term trend line. HRV picks up shorter-term fluctuations with greater sensitivity but is also noisier, with a typical measurement error of about 12% compared to 10% for resting heart rate. For most athletes, tracking both provides the clearest picture. A rising resting heart rate combined with a dropping HRV over several days is a strong signal that your body is under more stress than it can handle.
How to Get an Accurate Reading
The most reliable time to measure your resting heart rate is first thing in the morning, before you get out of bed. Lie still for a minute or two, then take the reading. Avoid measuring after caffeine, during periods of stress, or right after moving around, as all of these elevate your rate and give you a misleadingly high number.
Consistency matters more than any single reading. Use the same device, the same body position, and the same time of day. Whether you use a chest strap, a wrist-based optical sensor, or two fingers on your wrist counting beats for 30 seconds and doubling it, the key is doing it the same way every time. Over weeks and months, you’ll establish a personal baseline that’s far more useful than comparing yourself to a chart. Your trends tell you more about your fitness and recovery than any single number ever could.