Dr. Hussman's Body Transformation Super Guide: Where Energy Comes From.

Your body gets its energy from a molecule called ATP (adenosine triphosphate), which has three phosphate groups in it. If you really want to understand how exercise produces changes in your body, it helps to know a little bit of biology...
This section was removed per author request.

Be sure to check out our HUGE transformation section at:
http://www.bodybuilding.com/fun/newyearsguide.htm