By Jillian Levy, CHHC. The afterburn effect is formally called EPOC, ... That doesn't mean you can't work out in between HIIT days—active recovery workouts, like jogging and swimming, are ideal. High-intensity workouts can cause you to experience an afterburn effect even after you stop working out. (Exercise isn't the only way to maintain a high metabolism, btw. If you’ve tried working out before and haven’t really gotten any results then it’ll be a good idea to give these science-backed Afterburn effect workouts a shot. This causes a metabolic disturbance in your body increasing how many calories you burn. But with an Afterburn workout, you’re going to crank up your metabolism. So if you burned 300 calories during your workout, your afterburn would only be about 18 to 45 calories. The Afterburn Effect: How to Burn More Fat After You Exercise. Here are five powerful routines to try. This is likely the most popular way to practice HIIT and achieve high afterburn effects.