Resting heart rate is a valuable marker of overall health and longevity, influenced by life stress and physical fitness.

“So like one of the benefits of resting heart rate as a as a marker a longevity health marker is beyond sleep quality. It's actually like it's actually something that I think we should probably look at more in the medical community as a measure of overall health because it is directly affected by overall stress. So how much stress you live in your life, the more stressed you are, the higher your cortisol response, the higher sympathetic activation, the higher your resting heart rate is going to be by a few beats um by physical fitness. So the more fit you are, the lower your resting heart rate's going to be.”