In those years, various approaches have come and gone. In general, short refeeds, lasting from 5 to 24 hours were used every so often while dieting. I’ve tried them all. The Bodyopus diet was aimed at this goal, alternating 5 days of low-cal/ketogenic dieting with 2 days of high-carbohdyrate eating. Other approaches such as the Anabolic Diet or Rob Faigan’s Natural Hormonal Enhancement followed roughly the same scheme. There have been numerous other schemes over the years that alternated periods of low and high calories. The question is whether or not those programs were optimal. In my opinion, they aren’t for several reasons.