Well on my run yesterday I kept my HR up in the 153-160 range... it was an interval workout 2run/1walk. I ran a 2k - took me 16 minutes....160 HR was a bit too high. I was fine for the first 3 intervals but bonked at the end (had to do 4 to get to 2k). so next time, I'll try keeping it a bit lower (in the 153-155 range).

Hey I'm learning. At least now I CAN run for 2 minutes straight