I beta tested my cardio play list a little while ago when I went for a one mile walk, followed by a one mile run. It was the first cardio exercise I’ve done since last summer. I managed the entire mile without having to stop, although I jogged at a very slow pace. The music was good and helped some. I think it took me 10 or 11 minutes to do the mile, so it technically isn’t true cardio (at least 20 minutes). But I couldn’t keep going at the end. I’ll have to build up to 2 or 3 miles to get the full benefit. In the meantime, I’m going to try and keep it up 3 times a week and see if it helps.