I'm not sure how I feel about today. Well for one, in my first workout since I went down to sea level, I REALLY felt the lack of oxygen. In between reps that was the major issue. I'm not sure what the interplay between lactic acid buildup and oxygen availability are, hopefully I learn in Exercise Phys. Anyway, it was 4 by 8, 1 by 4, and 4 by 2, but I only ran 2 8s because Isaac and I both wanted me to take it chill today. 2:10, 2:11, 61, 29, 28, 28, 28. Not bad for on my own. 3:45 rest in between the 8s (long story), then 2:30 rest and 2 min between everything else.