Chances are you could do with some more cardio in your week. This is an easy way to get it in. Even if the weather is bad outside, you've got kids at home, you can't get to the gym or whatever that excuses voice is telling you - probably that you don't have the TIME - you can do this workout. Remember something is so much better than nothing because it means you start which creates momentum. Plus, all the little moments you take to give back to yourself add up to make a big difference to your fitness and the way you feel.