If you are engaging in bursts of cardio activity (or surges), that means you are increasing the severity of your cardio workout to the point that your heart rate is at a high-intensity zone for a period of time; in this case, 10 minutes. During a burst, you are working at your own personal limit and you should be breathing heavily. An example of a cardio workout that would include bursts includes a HIIT workout. How many calories you burn doing 10-minute cardio bursts depends on your speed, weight and gender. You can see how many calories you burn doing cardio for beginners: 10-minute cardio burst using the calculator below.