The best cardio machine is the one you will actually use twice a week. This section has workouts for every major machine plus conditioning plans that do not need one. You will find HIIT routines, steady state fat loss plans, sprint work, and low impact options for people with bad knees or hips. Each guide tells you how long, how hard, and how often. If you are still choosing a machine, our cardio buying guides compare them side by side.