Originally Posted by ericcox

^^ So true; What hurt yesterday was a new variation I am doing of WRI™ intervals to make the most of my commute home and the terrain I have available. Five 1 minute efforts (start with hard sprint, hold at zone 6), with ~2 minutes recovery between them. Except after the last one, after the 1 minute mark passes, I only back it down to just below threshold and hold it for 10 minutes. Leaves just enough time for a few minutes recovery before getting home.