No surprise: Running is one of the most effective activities for burning fat. It makes sense that the overall scorch would be greater because running — even if you don’t do it well — involves the careful coordination of the limbs and the engagement of the core to stabilize the hips in stride. Science supports this, with a 2003 study in Great Britain finding that subjects running on a treadmill burned a higher amount of fat than those who trained using a stationary cycle.