Originally Posted by

**hamster**
Ok, I got it. It includes the basal metabolic rate. In their model, it costs you around 150 calories/hour (depending on your weight) just to sit on the bike without moving. Subtracting the BMR, what's left is a fairly clean model of a bicycle with low-to-average frontal area (Cd*A 0.5 m^2, about right for a road bike on the hoods), high rolling friction (C_r ~ 0.01), and no dynamic rolling resistance. The model completely ignores your height and uses a fixed value Cd*A in all cases.