Thanks Pete. I just about read the 2/1 in another thread. Looking back, I am on week 2.75 of this. First week was a FTP test, that I failed - went too hard out of the gates, followed by one day of intervals, then two weeks of 2x per week intervals.
I will make next week a rest week, then continue.
I don't have a fitness tracker, need to look into one... I do check my resting HR from time to time, it was elevated this morning.
Another fun factor - I am T2 diabetic and eat low carb/keto to control blood sugars. It works well for long rides, but training at intensity is a whole different animal. I'm trying to eat what's called targeted keto - adding carbs for hard efforts and recovery - it's a tough thing to balance.