RHR of 39 - Should I be worried?

No - mine is 42-45 and I'm 51, VO2Max of 52-55. Good fitness is reflected in a low RHR

Take a manual pulse for comparison.

He's probably just showing off. VO2 of 56 is not average.  

If not, and I'm being a jerk, then absent other conditions I probably wouldn't worry about it, maybe bring it up at your next check up if they don't catch it with the pulseOx reading.  I have mild hypothyroidism so mine can get a bit low, sometimes, but once I got on the thyroid juice I'm pretty much in the 50's and 60's now.  RHR can get in the low 50's / high 40's especially at night.  Prior to the juice I was hitting mid 40's and I'd guess that was too low.

haha, that was kinda of my thought too - like, "I'm 93 years old and do ultra-marathons at a 5:00/mile pace, should I be worried or is that an indication that something is wrong?"

But seriously though, a 39 RHR is nothing to worry about if you're an athlete. It's only a problem if you're an obese couch potato and have a 39 RHR, in which case something might be seriously wrong. But for someone with a VO2 Max of 56, I'd say 39 RHR is pretty normal.

My RHR average is 47, and my VO2 Max is 46. Generally speaking, as your VO2 goes up, your RHR goes down, and vice versa.

DontGetTheSwiss said:

He's probably just showing off. VO2 of 56 is not average.  

I think that's being a little unfair. Some people having access to new data might well not be aware what the numbers mean so it's a fair question to ask. It's only because I've had Garmin watches for years that I know my VO2max of 47(ish) and RHR of 46 is good for my age (63) but others might not know what the numbers mean for them.

As I said, if anyone does have concern about the heart rate data from the watch then it's easy enough to take a manual pulse for verification. Bear in mind that resting pulse should be taken when well-rested usually on first waking up.

BTW the picture the OP posted suggests the watch is begin worn to close to the wrist bone too.

That overview abow is not what Garmin use. I am 64 , my Vo2max right now is 45, that give me rating good in Garmin Connect, to get to excellent i need 46 and up. By the way, my 7 day average rest heart rate is 40. 

Jano22222

I never suggested it was (and apologies if you believed that was the intent) but it's just one of many that provide an indication of levels. It doesn't matter what or how you split the bands, it's only the number that's important,

Many doctors will become concerned about RHR's below 50 (known  as Bradycardia), as it can result in not enough oxygen being delivered to the body, and can indicate other heart problems.

However, Exercise Induced Bradycardia and very low RHR's is common amongst athletes and those who exercise regularly, and is seen as unconcerning and even beneficial condition. Basically because they exercise regularly, the heart and lungs become very efficient, and can deliver the oxygen the body needs at rest at a low heart rate. Amongst elite athletes, values in the low 30 to mid 30s are pretty common. Mine varies from 38-42 depending on where I am in my training cycle, and I wouldn't consider myself anywhere near elite.

See your doctor if you are concerned.

No not ar all. I’ve seen that before, so only little confused. After all it’s just fun when the watch tell me my fitness age is 21. Sometimes my body feel like 91.....hehe. 

Miguel Indurain had a rest heart rate of 28. Then you are not stressed.........