How High Intensity Interval Training (HIIT) can prevent heart disease and burn calories.

Let’s start with the calories you’ll burn, which are many, not only during the workout but also in the hours afterwards. The latter comes from the excess post-exercise oxygen consumption (EPOC) effect, where your body burns more calories as it returns to its normal resting state after a workout and adapts to the exercise you’ve done. The EPOC effect increases with the intensity of the exercise you do, which is why HIIT is such an effective fat burner.   

The single most well-established benefit of interval training has to do with heart health.  Intervals can boost cardio-respiratory health with a smaller time investment compared to continuous forms of exercise. So we’re not talking about superior fat-burning capacity or bigger muscles. We’re talking about improved VO2 max, a measure of endurance that calculates the maximum volume of oxygen the body can use.  Scientists have found that [VO2 max] is one of the best predictors of overall health.  The more aerobically fit you are, the better your heart can pump blood, the longer it takes you to get out of breath, and the farther and faster you’re able to bike or run or swim.  And that, in turn, can help prevent heart disease.