Carrots, Sticks and Lower Premiums
nytimes.com
nytimes.com
The rest of the Hacker's Diet is worth reading and has an excellent analytical approach to describe the eating (inputs) and energy use / exercise (outputs) of a simple model for your body.
If anyone is interested in developing in this area connect up with me; I'd be interested in hearing from you.
We are a team of two and have some prototype code. donna (at) genuus (dot) com