A normal resting heart rate for a 14-year-old is 60 to 100 beats per minute (bpm). Most healthy teenagers will fall somewhere in the middle of that range, though athletic teens can sit well below 60 bpm without any cause for concern.
Resting Heart Rate: The Key Number
The 60 to 100 bpm range applies to adolescents aged 13 to 17, the same range used for adults. Within that window, there’s a lot of normal variation. A 14-year-old who regularly plays sports might rest at 55 or even 50 bpm because their heart has adapted to pump more blood with each beat, so it doesn’t need to beat as often. A less active teen might sit closer to 80 or 85 bpm and still be perfectly healthy.
One detail worth knowing: girls tend to have a resting heart rate about 5 bpm faster than boys during adolescence, a difference that emerges with puberty and persists into adulthood. This is driven by hormonal and structural changes in the heart that happen at different rates for each sex. So if a 14-year-old girl consistently measures a few beats higher than a boy the same age, that’s expected.
What Affects a Teenager’s Heart Rate
A single reading can swing 10 to 20 bpm in either direction depending on what’s happening in the moment. Caffeine from energy drinks or coffee speeds the heart up. So do stress, anxiety, dehydration, and heat. Even standing up quickly can temporarily spike the number. If you’re checking your heart rate (or your child’s), the most reliable reading comes after sitting quietly for a few minutes with no recent caffeine or exercise.
Puberty itself plays a role. The hormonal shifts of adolescence cause the cardiovascular system to remodel, changing heart size, blood volume, and how the electrical signals in the heart behave. This means a 14-year-old’s resting rate can fluctuate more from month to month than an adult’s would. Occasional readings outside the 60 to 100 range, especially during a growth spurt, aren’t automatically a problem.
Heart Rate During Exercise
A 14-year-old’s estimated maximum heart rate is about 206 bpm, based on the standard formula of 220 minus age. That number represents the upper ceiling, not a target. During moderate exercise like jogging or biking at a comfortable pace, heart rate typically lands between 50% and 70% of the maximum, which works out to roughly 103 to 144 bpm. Vigorous exercise like sprinting, competitive sports, or intense cardio pushes it to 70% to 85% of maximum, or about 144 to 175 bpm.
These are estimates. Some teens will naturally run higher or lower during the same activity. The more useful signal is how the heart rate recovers afterward. A healthy teenager’s pulse should drop noticeably within the first minute or two of stopping exercise and return close to its resting level within 10 to 15 minutes.
Heart Rate During Sleep
Heart rate drops during sleep because the body’s demand for oxygen decreases. For a 14-year-old, it’s normal for the pulse to dip into the 50s or even the high 40s overnight, particularly during deep sleep stages. If your teen uses a fitness tracker and you notice low readings at night, that’s generally a sign the body is resting efficiently, not a red flag.
How to Measure Pulse Accurately
You don’t need any equipment. Sit down and rest quietly for a few minutes first. Turn one hand palm-up and find the spot on the inside of your wrist between the bone and the tendon on the thumb side. Place the tips of your index and middle fingers there, pressing lightly until you feel each beat. Don’t press hard enough to block the blood flow.
Count the beats for a full 60 seconds using a clock or phone timer. A shortcut is counting for 15 seconds and multiplying by four, though the full minute gives a more accurate number, especially if the rhythm feels uneven. Take the measurement at the same time of day (morning is ideal) for the most consistent comparison over time.
When a Heart Rate Is Too Fast or Too Slow
A resting heart rate consistently above 100 bpm in a teenager is classified as tachycardia. On its own, a slightly elevated rate can be caused by something as simple as anxiety, caffeine, or dehydration. But if it comes with palpitations (a pounding or fluttering feeling in the chest), dizziness, lightheadedness, chest pain, shortness of breath, or unusual fatigue, those symptoms together point to something worth investigating.
On the other end, bradycardia means a slower-than-normal heart rate. An athletic teenager with a resting rate as low as 50 bpm is typically fine. The concern arises when a slow heart rate is paired with symptoms: feeling unusually tired during physical activity, getting dizzy, fainting, or having trouble concentrating. Some teens with an abnormally slow rhythm don’t notice any symptoms at all, which is why a routine check during a sports physical can catch things that feel invisible day to day.
A single unusual reading isn’t cause for alarm. A pattern of readings outside the normal range, or any reading combined with symptoms like fainting or chest pain, is worth having checked.