running 50:00 
to track - figured if i want to run 6:30 pace, it would be a good thing to practice it. ran ascending ladder, times were not to hard to hit (but not easy either), but running continuously for miles is another matter. 200, 400, 600, 800, 1000 with 1/2-1 lap jog between.
Maybe my goal should be to keep hitting the times, but extending the interval longer and longer!