I am basing my training on the New Century program. I am using this program to prepare for a 65 mile Ride For The Cure event on July 10 which will be at the end of week 8.
I plan on doing 2 local group rides each week. The rides usually get my heart rate up pretty good because the pace of the groups is a little beyond my normal comfort zone at times (not a bad thing in my opinion).
If I am scheduled to let's say do 3 8 minute steady state intervals at 92-94% of my field test average and I go out on a group ride that week and spend 24 minutes in that zone on the group ride, should I scrap that interval session that week and spend that time in my endurance miles HR zone?