1) Allthough subject to training, Your resting heart rate in large measure is genetic.
2) having a lower RHR does not make you faster or stronger, than someone else with a higher RHR.
3) The reason you may want to track your own RHR is to see if you need to back off on training, (i.e you need a little more rest, or you're getting sick.) and to measure fitness adaptation over time.
If you're not tracking changes in your own RHR regularly, the only value in even knowing it is to brag about it.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.