Cardio has become a pop culture phrase in the gym, “going to do cardio”. What does that mean? Well, it could mean a lot of things. For instance, I might be wanting to get a good sweat, or I might want to go for a run, or it could mean I want to burn a lot of calories. Cardio here at Fire and Ice is simply getting your heartrate into a specific zone. Furthermore, we want to create some endurance. Endurance is the ability to sustain a certain output for a certain interval. When you train your cardio system its not just the heart, its also all of your arteries, veins and capillaries all working together to get nutrients to your cells. Some of the best conditioning for cardio isn’t even working out vigorously its slow and steady.