If you want to get most out of your refeeds, you may wish to limit your
fat intake and consume foods with a high glucose content (e.g., sugar)
to substantially increase your leptin levels.

Yes, I did just that & ate lots of sweets & drank sugary drinks. It's easy
to pile on the calories on those things 'coz sugar doesn't really fill you
up like 'proper food' does.

I read about it online although the websites I found seemed to be geared
largely towards bodybuilders, I also read some stuff by Lyle McDonald, who
seems to be a bit of a guru on the subject.