I have a question about the endurance workout of TR. I just used 2-hour endurance ride with TR Boarstone (my first time) that different style from I trained in the past , I always train my Zone2 like 1st W-up + steady 56-75% FTP by my feeling in that day and training duration + Cool down . So the program seem alternate the power all the way ( every 10-15min) in Zone2 . Could you explain me about for this style? Is it better and Why to train like this?