It is possible to do more in less time — at least when it comes to your workouts. By incorporating interval training — that means bursts of high-intensity moves — you’ll give your metabolism a huge boost, says Glenn Gaesser, Ph.D., director of the Kinesiology Program at the University of Virginia and author of The Spark. If you usually jog at a consistent pace, try adding a 30-second to one-minute sprint every five minutes, or, if you’re on a treadmill, change up the incline for one-minute intervals.
At its core, burning fat comes down to the process of lipolysis—the breaking down of fat lipids, explains Seedman. This happens in the mitochondria of the muscles, or the powerhouses of the cells, responsible for generating the energy our cells need to do their jobs. Exercise has been shown to improve mitochondria function, which then promotes fat breakdown, Seedman adds. Plus, working out helps regulate pretty much all the hormones that optimize fat loss.