I had mine measured four separate times at the doctors and it was very low. Low enough that they doubted it each time and kept checking it. Then made me wear an ECG for a full 24 hours to see what was going on.
This still confirmed the low rate but showed a high max and good recovery. Didn’t explain the low rate though – my low was consistently 37.
I’m almost 50 and fat (so my missus tells me)I don’t race, I just ride about on my bike a bit. Don’t drink or smoke and eat good food. They felt it was worth checking out even so.
So they sent me off for proper tests by a specialist, paid for by my private health care. Ultrasound scan, treadmill all wired up, the works basically.
In the end the specialist said “yes, its very low, but your not going to die”.
He ruled out the normal problems that are likely with a low rate and said keep riding.
Its worth getting it checked out, you only have one heart and one go at life.