Average heart rate 45-47 bpm, age 36

That's your resting FART rate. Give us the real numbers.

Mine is 36-40 depending if I'm laying around. My watch sends me alerts because it thinks my HR is too low

I'm 65 and my HR is in the high 40s up from the mid to low 40s twenty years ago. It never meant much as far as running ability. I was never better than a mediocre runner.

Hopefully the running all of us on this message board have done is keeping our hearts strong and healthy. That's what matters.

Idiots?? No.

Actually, these aren't abnormally low at all for extremely fit folks. The fittest people in the world have resting HRs in the 40svir even 30s. In fact, if you have a HR in the 40s and you can hit a high HR in the high 180s - 200s you are going to perform extremely well at aerobic events.

If you are unfit and have a resting HR in the 40s but can't get above 100 ever, yes you have a cardiac issue.

According to this app, my resting fart rate this morning was only 2 fpm.

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When training in college, high 30's was the norm, and when tapering, mid-30's. Now at 60y, resting is still below 45. I have a 15y daughter (~2:30 800m; ~20:30 5k) and her resting is low 50's. While training helps keep it low, the majority of the effect is genetic, don't think anything else.

Agree with Atntipodean - Largely a matter of genetics, but weight and training can be additional factors that influence the result.

I am 67 (will turn 68 in less than a month), my current RHR is 44-5 (day) and as low as 39 during sleep. Had to turn off the low heart rate alert on the smart watch as it kept going off at night.

In my 20s was usually in very high 30s. I thought that was 'special', until I learned it was just a combination of training and genetics.

As some have correctly pointed out already, lower is not necessarily better; mine has always been a bit on the low side (34 throughout my 30s, now 42 at age 68), but I am nowhere near the runner Jim Ryun was (~60 resting HR, if I remember correctly, when he was young and world record holder) - there are many far superior athletes with higher resting HRs. It's interesting to me that mine has climbed with age, but it sounds like that happens to lots of folks, and I am nowhere near as fast as I was 40 years ago! My new apple watch routinely gives me warnings about how low it got during my sleep :-) It may tell you something about your fitness compared to your own fitness at other times, but comparing it to other people's gives no useful information, I'm afraid!

73 Yrs Old - 48 BPM (no running, summer swimming 15 mins/day )

Turning 85 in two weeks, my resting heart rate similarly remains around 44 to 45, which alarms doctors until they learn of my daily miles of running (around 5 to 6 miles on average).

I'm 66 and my resting pulse is 37-40 (higher after hard-workout days). When i was about 40 I had someone look at a heart-rate monitor I was wearing in my sleep and it said 31. But like others have said, it isn't all about fitness—my dad's resting pulse was 48 and he never did any aerobic exercise.

Is this really is your “average” throughout the day and includes your work outs, impressive. If it’s just your “resting” heart rate, probably half the people here equal or beat that (including me).

33 bpm, age 36

I'm now only 49 bpm at 63 years old. In my late teens through 20s was 36 bpm. Stopped measuring such things in my 30s until recently when I started working out again.

Is there a 'dynamic range' below which is considered a problem or above is considered a problem? I'm 63 with a RHR of upper 40s with a maxHR of about 160. Problem?

28 at the zenith of my athletic career along with an 85.5 VO2 max. Now just in the 40s (the resting heartrate, not the VO2).

D1 1500 runner, mine is 53-57. Am I cooked?

Me. Late 40s. When I sleep at night it is 30 or 31