I went out last weekend and did a 60 minute test. Heart Rate was approx 90% of Hrt Peak for the 60 minutes.
When I use the power from this test as my FTP on my indoor trainer for my 4x8 intervals I am nowhere near my 90% Hrt peak threshold - its much lower, close to 80% of peak in fact. My indoor trainer is calibrated.
My RPE at this 80% power on the trainer feels about right maybe a touch low but not hugely far out. Heart rate drops to sub 70% prior to the start of each 8 minute interval so i’m easily handling the trainer power.
Do I increase power for my 4x8s until my hrt in the last couple of intervals is closer to threshold hrt/90% of peak ? @ryan ?