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Normal Resting Heart Rate But High Active
brandond24 posted:
Hey everyone,

I am an 18 year old male. My resting heart rate is normal and usually 55-65bpm. However, my active heart rate seems to get quite high after running for a few minutes. It hit around 185bpm...any idea why my active heart rate is so high even though the resting heart rate is fine? I don't take any medication and do not have any known conditions. I have played basketball for years quite often too. I have never passed out or felt any serious side effects from playing for a while.
cardiostarusa1 responded:

"My active heart rate seems to get quite high after running for a few minutes."

"Any idea why..."

One can only guess or speculate here, and since you are obviously concerned (hence your post), please see a/your doctor about it.

The Basics

Normal resting range heart rate (HR) is 60-100 beats per minute (BPM). Average resting HR in men is 72-78 BPM and in women is 78-84 BPM. Over 100 BPM is tachycardia (fast heartbeat). Under 60 BPM is bradycardia (slow heartbeat).

Heart rate, as well as blood pressure, should rise gradually/accordingly during activity/exercise/to the intensity of the activity/exercise.

Additionally, heart rate recovery (HRR) is very important. This is how fast the heart rate returns to normal (for the individual) after vigorous exercise/physical activity, with the first minute being the most critical or tell-tale. The heart rate should gradually and smoothly return to normal within several minutes. Blood pressure (BP) response after is naturally very important as well.

..."and do not have any known conditions"

Of the various types/kinds of heart conditions, some which can occur at ANY AGE, symptoms may/can be acute (occurring suddenly), be chronic (occurring over a long period of time), come and go (be transient, fleeting or episodic) or even be silent.

Best of luck down the road of life. Live long and prosper.

Take care,


WebMD member (since 8/99)



Be well-informed


Target Heart Rate Calculator

When you exercise, your body speeds up, and so does your heart as it works to meet your increased energy needs.

But how much speeding-up of your heart is safe when you exercise? You need the answer to this question in order to maximize your exercise benefits while not overworking your heart.

Your target heart rate isn't one rate but a range of rates (beats per minute, or bpm), expressed as percentages of your maximum heart rate, that are safe for you to reach during exercise. For most healthy people, the American Heart Association recommends an exercise target heart rate ranging from 50% to 75% of your maximum......

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SEE Table for estimated target heart rates for different ages.

Age - Target HR zone 50-85% - Average Maximum HR 100%

Your maximum heart rate is about 220 minus your age

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brandond24 replied to cardiostarusa1's response:
But I am asking why my resting heart rate is around 55-65bpm yet my active heart rate hits 185bpm without too much effort? If my heart was not healthy the resting heart rate would probably not be that low. Thus, I want to know what condition may constitute a normal resting heart rate but really high active one. I looked online and couldn't find any literature on this circumstance.

Thanks for the response though
billh99 replied to brandond24's response:
A-flutter and AFIB can cause sudden changes in heart rate and exercise can be one trigger.

Although I don't know if often switches on and off as you indicate.

In some case it can be symptomless.

But it really should be checked out.

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