So I ran indoors for all of week 1 and it was fine. This week, however, for day1 I was able to get home at a decent hour and run outside. After doing both, I think I prefer to go out. Even though inside, I had the benefit of watching tv while I ran to make the workout feel faster, it was nice to have a change of scenery and breathe fresh air. The fact that the world outside my living room is nowhere near being a flat surface, and included what felt like more uphills than down, made me feel like I was getting more of a workout.