Another ride today. This one a 60 minute endurance ride. Another 18 “virtual” miles and I’m passing Lake Merced Park south of San Francisco. I was not “feeling” this ride. It was a slog start to finish. Yesterday’s live ride took it out of me. This was meant to be a zone 2 heart rate ride. I was 63% in zone 3 & I’m thinking that could be age related as power and heart rate zones collapse with age.
