This will not only help you maintain your diet but such dramatic spiking of calorie intake this way once per week increases fat
loss by ensuring that your basal metabolic rate doesn’t go down due to extended calorie restrictions. It also causes a host of hormonal changes that improve fat loss, from increasing cAMP and GMP, to improving conversion of T4 thyroid hormone to the more active T3. The psychological benefits outweigh even the hormonal and metabolic benefits.
If you plan ahead of time and understand a little science, it is possible to limit the damage of binge eating. Eat whatever you want on your Feast / Binge eating day while following specific steps to minimize fat gain during this overfeeding.
The goal is simple: to have as much of the wrong calories ingested either go into muscle tissue or out of the body unabsorbed.