Interval/Tempo Training & HR (Page 2)

This has been a great discussion...a runner I am not (yet)! I appreciate the many views on run training. Rocket Man's Race Pace intervals work..(did them last year for Alcatraz, should be doing them now if I can get my back/knee issues sorted out).

Just wanted to comment on terms, which has nothing to do with my limited knowledge of run training (as opposed to swim/bike which I'm far more comfortable with).

Friel uses "tempo" to describe Z3 runs, and uses "Cruise" to describe Z4/LT sessions. I think the terms lend themselves better the opposite way, but just wanted to throw that out here which may help to account for some of the confusion in the OP.