We start running tomorrow in gym class and my goal is to burn fat. I'm a decent runner but don't know how to burn fat best. With all the recent threads about how its best to run in the morning, before meals, speed of running, blah blah it gets me confused. If i want to burn as much fat as possible during the run, how should i go about it? If i run at a steady, relatively quick pace i will be burning fat. If i decide to push myself, and run harder, is there a chance that i'll burn LESS fat and just improve my cardiovascular system. Tomorrow i figure i'll run 4-5km, how long should it take me to have an effective fat burning workout. i'm just confused... Thanks in advance.