I can't tell you how many times I've heard, "I ride my bike 150 miles per week and can't lose 1 pound!".

It just goes to show that a good exercise program can easily be subverted by a few poor food choices.

Most people who are successful at weight loss use exercise to help burn off calories, and the bike is a very efficient way to do that. But, if you want to be successful, you'll also have to take charge of what you put into your body, and how much you put into your body. Not eating veggies, and eating high-calorie foods like bread, are good ways to fail.

Bottom line - you're probably going to have to grow up, and learn how to eat right.