I have got enormous value from tracking my resting heart rate and body temperature. Anything under 75 bpm or under 98F and I know I need to eat and sleep more and skip exercise. No need to log. I think a ton of folks would benefit.
Beyond those two metrics I can't think of anything it'd be useful to check regularly. Reflex time or achilles reflex test might be good.
Beyond those two metrics I can't think of anything it'd be useful to check regularly. Reflex time or achilles reflex test might be good.