Originally Posted by canklecat

I take notes on the Elite HRV app, which has been pretty accurate for me. It sure seems to coincide with my good and bad training days. I've done blind tests when I'll do a morning reading but don't look at the results until after a ride or workout. Sure seems to accurately predict whether I'll have a good training day or should have taken a light day or rested.

Ditto the notes section on Strava, although often I'll set those logs to private if I'm dealing with physical issues I don't want to publicize. Due to a pesky auto immune disorder that led to thyroid cancer and screws up my entire endocrine system, I have some really bad days. And plenty of pretty good days. I may go ahead and take an easy ride or workout, but I'll set that log to private, along with notes about how I was feeling, my heart rate and BP, etc. My friends already know about my condition, I just don't want them to feel obligated to post "Aww, poor feller" comments on my logs for bad days. It's just for future reference so I can track whether my feels-like gauge consistently corresponds with good/bad rides and training days.

And Google calendar, for the same stuff. Mostly so I'll have more info to discuss with my doctors, endocrinologist, ortho docs, etc. Helps keep things in perspective over time.

It's just more info, along with wind conditions, weather, bike weight, tires, blah-blah-blah. Same as the Elevate browser extension, intervals.icu and other fitness tracking stuff.