Cardio exercises that increase your heart rate. how to make six pack you start doing regular cardio, then your body's extra fat will start burning. You must also know this and studies also show that cardio is more effective when you want to reduce belly fat, that is, with the help of cardio, you can remove fat from the abdominal area. For this, you can jog for five to ten minutes, then run fast for ten minutes and then jog for five to ten minutes. Jogging, sprinting, running, rope jumping are some of the best cardio exercises.