Whew! I really can't say enough about how awesome the Nike Training Club app is!  Ever since Baby N arrived, it seems like there are only about a quarter of the hours in a day that there used to be. The 15 minute workouts on the app are great because I can throw them in while she is taking her rather unhelpful 15-20 minute power naps. There are also30-45 minute workouts, and you can even customize your own month-long workout program! (No, I'm not getting paid by Nike - I just love it when I find a good thing! But maybe I should...)  Anyway, get it and try it out, especially if you're short on time.