Originally Posted by rubiksoval

Oh, yeah! The 10% rule (less than 10% of any ride in Z1). A quick and easy way to boost overall average speed and power. But this is obviously highly dependent on routes with little to no stops or downhills in which you can no longer pedal.

90% of FTP is the "sweet spot" region in Coggan/Allen cycling lore. It's one of my favorite "zones" in which to train because it's repeatable for multiple days throughout the week, it gives a lot of aerobic benefits, and it's a lot more enjoyable speed-wise than just spinning around all day in Z2.