You reclaim it downhill if you book it. Casual riders seem to brake after reaching a certain speed, so they will send that energy to heat the brakes. Plus, the

You reclaim it downhill if you book it. Casual riders seem to brake after reaching a certain speed, so they will send that energy to heat the brakes. Plus, the unfun of getting up the hill is probably more important than the fun going down, as it takes longer :)