keep your HR up, and ride everywhere... in the first 20-30 minutes of a workout, you're not burning any fat. You start by using creatine phosphate. A few minutes in, you'll enter the glycolytic process, which basically just uses sugar stored in your liver, blood, and other tissues...

Once you hit 20-30 minutes, you start turning stored fats into energy, so you want to make sure that you're working WELL into that time... try to do at least 45 minutes to an hour at a time, and do it at least 3-4 times a week... but seriously, just ride everywhere you go, make it a routine, and you'll slim down and feel great.

*Body Break!*