This is trivially observable as untrue to anyone with an athlete level of physical activity. Eating enough food to sustain training for a marathon is work. Con

This is trivially observable as untrue to anyone with an athlete level of physical activity. Eating enough food to sustain training for a marathon is work. Consuming enough calories every day during peak training for a marathon is exhausting, disgusting, and you’re always hungry. Food loses all connection to enjoyment and you’re just shoveling calories in your face all day. You could stop but then good luck training the next day. I have so far not gained any weight during these cycles. Usually I end up losing some. So the calories gotta be going somewhere.