Lets talk about tempo runs. I would like to hear how everyone describes a tempo run, how far, and how fast they should be.
The term tempo run is thrown around quite a bit, and the exact definition that I prescribe to is offered by Jack Daniels.
Tempo Run Pace = 1 hour race pace
So, it is impossible for Hall to do a 15 mile tempo run as he's uploaded on the interwebs. 12 miles is pushing the brink of a 1/2 marathon time trial, and his paces are not approaching the 4:35 / mile required for his 59:43 / 1:0X shape he is currently in.
So, lets talk about tempo runs, eh.
Of course, lactate production occurs at all levels of running, so 1 hour race pace per mile +20 seconds could still be considered a tempo run of sorts, eh..? but lets not go too much further than that.