Step 1: Go on a 4-hour ride at a good solid pace; 0.8IF with some pushes above threshold. Fuel well but look to burn 2000-2500 calories.
Step 2: At the end of the 4 hours, find a fast downhill section and ride into the back of a car, fracturing a couple of bones in your face and giving you a concussion with severe enough nausea to prevent you eating anything more than the occasional yoghurt for two days.
Of course I jest. But it’s interesting that just 2 days’ enforced fast seems to have had a dramatic impact on my weight. Even after 4 days’ back to normal eating and now feeling strong enough to do turbo sessions, my overall weight is still 1.6kg lower than it was the morning of the accident, and the body composition scales tell me I’ve lost 0.7kg of fat.
Perhaps the energy burn required by the body to repair wounds is one that happens at a low enough level that it’s actually an effective fat burner??