Since there is no data, one way or the other, illustrating what happens in dieting weight lifters when refeeding, there's only speculation. Of course, Leptin itself aside, if there were some prolonged increase in Leptin, we should be able to measure the effects of this Leptin increase by observing increases in metabolic rate the day after the refeed. Unfortunately, metabolic increases as a result of acute overfeeding aren’t observed a day after the overfeed (or refeed). But no matter, I don’t want to make a big deal about either of these points. As I’ve indicated in previous columns, I do see other good reasons (i.e. a psychological break from dieting, increased adherence, better glycogen status, more intense workouts) for refeeding besides the Leptin issue.