Here’s how you can slim down quickly with HIIT cardio.I get asked all the time by women in our fitness accountability group how to lose the extra weight and extra stomach. When I ask what they are doing they say they do cardio for hours upon hours a day and still not seeing results. I then have to stop them. Staying on a comfortable setting on the treadmill or elliptical will not change your body composition. It will strengthen your heart and cardiovascular system but it won’t burn extra fat or help you lose inches. The secret cardio weapon to do that trick is killer HIIT cardio. What is HIIT? HIIT stands for high intensity interval training. A typical routine takes you from comfortable to very much uncomfortable in bouts and has you repeat these interval circuits multiple times. It burns more calories, burns more fat and can jump start any weight loss stall or plateau you may be experiencing.