When young guys with obesity do intense burst running, their bodies burn more fat in the half-hour after the workout than when they jog steadily — even if both workouts burn the same number of calories.

When young guys with obesity do intense burst running, their bodies burn a bigger share of fat in the hours after the workout compared to when they do steady, moderate jogging—even if both workouts burn the same total calories.

When young guys with obesity do intense interval running, they burn more total calories than when they do steady, moderate running—even if the workout burns the same calories—because their bodies keep burning extra calories afterward.

After tough workouts like HIIT or circuit training, fit guys burn fat faster in the hour after exercise compared to easier, steady workouts—even though they burn less fat during the actual workout.

If a fit guy burns more carbs during a tough workout, he's likely to burn more fat afterward while recovering.

Short bursts of super-hard exercise, like sprinting or HIIT, burn more belly fat than jogging at the same pace the whole time—because your body goes into overdrive, releases more fat-burning hormones, and keeps burning calories even after you stop.