I've known of guys taking a day or two during a training cycle(Usually an off day) and and eating calorie dense foods and sleep alot. They say the feel better coming off the downtime, but they do limit it to once during a training camp.There is a reason some people lose sanity on diets. First is variety, second is thinking they have to be perfect. Unless my client is making weight for a fight they have one cheat DAY a week. Four weeks out its one afternoon a week etc etc. That being said if you are doing everything right etc, a Refeading of sorts is extremely beneficial, more so than harmful