Interval training refers to varying the intensity of your workload during cardio sessions. This can be done by upping the speed or the level on the machine at regular intervals throughout the workout. For instance, on a treadmill, you might try a brisk walk or jog for a minute followed by sprinting for a minute and then go back to the jog, etc. You can also apply this technique to a stair stepper, an elliptical, or a cross trainer. Proceed at a moderate pace for a prescribed period of time (typically 1-2 minutes), then kick things up to a fast and furious pace for another prescribed period (typically around 60 seconds), then return to moderate pace. Rinse and repeat. Research shows that not only does training in this manner burn more calories during the actual cardio session, it also increases your calorie-burning during the hours following your training.
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