Last week I did one of my favorite workouts: Cruise intervals!
For the first few years I ran, I had no idea what they were. I saw something on the McMillan calculator about cruise intervals and wondered what they were, but I didn't figure it out until I read this training book. (There is a 3rd edition out now, which I plan to purchase since my original copy is getting ragged.)
It's all quite simple, really.
Cruise intervals are designed to take a tempo workout and break it up into manageable pieces.