Originally Posted by Black wallnut

Who is giving medical advice? You seem to have much more faith in your Dr. than I have in mine, however I greatly respect mine. She is not an expert in athletic training which for me is what cycling is. My goals include better health but also increased athletic performance as measured on on the road climbing hills or faster times over set courses (segments on Strava) plus how I do on race day during cx season. Weight loss makes me faster while also making me feel better, look better. Yeah I had a stress test once. It did not include finding the limits of my heart rather that I had a healthy heart. I was not much of a cyclist at the time, if at all.

Bill you might also want to add once a week or so an all out effort for 30-40 minutes or maybe not. If you do over time increase the duration as your fitness improves.

I also am not bored when I do base building miles at slow speeds. I do know I will not be able to do it for a month straight without some hard efforts.