Resting Heart Rate explained and analyzed

A few notable articles on resting heart rate, why it's important, and how to measure it. I find it to be a key health metric for me to monitor wellness, training and overtraining, and physical fatigue (vs. mental fatigue).

- A basic review on Wareable - How to use wareables to lower your resting heart rate

- A more geeked-out article from DC Rainmaker on Understanding continual (24/7) optical HR data and resting heart rate

And from midpackgear.com, a post on irregular spikes in resting heart rate on Garmin optical HR devices.