yesterdays workout was 3, 2, and 1 min hill sprints. I truly love this workout...it allows me to go as hard as i want to and go up hill...i like the way it works the legs and hart rate...hard and high!
The graph didn't show up as large as I wanted...but you get the drift on the non stop ups and downs for the HR and the elevation...


the hills aren't too long here so for me to find a hill that will last 3 min when i'm going full speed is hard to do...the one i have been using is about 2.5 min at full speed, so i tag on about :30 sec of a false flat run up to the hill...it seems to work pretty good.