I don't know much about this program, but I have read many posts from others on this subject. I get the gist of it, and they sound great, but it sounds like you can only use these on a treadmill or something. I don't have a treadmill, but run outdoors. Can you use Cardio Coach to run outside? Is there just an instructor telling you things, or music, or what? I'm curious! Thanks in advance!