Got out and did 4x3min. intervals with 6min. rest in b/wn. I wasn't completely spent by the end of the workout so I added a few more miles in. I was def. gasping for air at the end of the 3 min. though. It felt like FORever. I'm hoping this is the kind of interval wkout I need to be doing. I think maybe next time 2 min intervals with 4 min rest b/wn?