One of my favorite ways to get cardio in is to do HIIT workouts.  HIIT stands for High-Intensity Interval Training.  High-intensity workouts have been shown to help burn fat, increase metabolism, and increase endurance.  These are just a few reasons why I do these workouts.  Another is that the workouts are usually shorter than most cardio.  Plus, it’s a good excuse to do sprints.  I was a sprinter in college, and this is an excellent way for me to get some sprinting in.