Would there be any conceivable benefit to doing the following. Lets assume 3 on days, 4 off days. Sunday - Off - 2000 cal - 30/30/40 (F/C/P) Monday - On - 2500 cal - 20/30/50 (F/C/P) Tuesday - Off - 2000 cal - 30/30/40 (F/C/P) Wednesday - Off - 1500 cal - 20/10/70 (F/C/P) Thursday - On - 2500 cal - 20/40/40 (F/C/P) Friday - Off - 2000 cal - 30/30/40 (F/C/P) Saturday - On - 3000 cal - 20/40/40 (F/C/P) The actual calorie numbers are arbitrary. My point is can there be any conceivable benefit from altering the calorie intake / macro nutrient ratios by quite large amounts from day to day? Say dropping from 3000 on Sat --> 2000 on Sun is a 33% decrease in calorie over one day. Or increasing from 1500 on Wed --> 2500 on Thur is a 66% increase. Also, Wed being an off day and cutting carbs to 10%, then increasing them to 40% on Thu (on day) - could there be any benefit? I have read articles about "shocking" the body and having high carb days (such as the 40 days) and having extremely low carb days (10) as a method of "rebooting" the metabolism. Beyond that, I've also read that fluctuating cals from day-to-day or week-to-week by large amounts (500 cal at the least) can also serve to keep the body in a "guessing" mode, so that it never really gets comfortable or "settles". So, OTFN, am I reading bullshit articles and hearing bullshit advice? Is this sort of thing only really beneficial on a cut? Does it serve better to maintain consistent calories when not cutting or when cutting? I'm not sure how this would benefit bulking at all (remember, cal numbers above are arbitrary - adjust for your needs). EDIT: Or would it be more beneficial to maintain a consistent calorie intake for 4 or 5 days of the week, and then suddenly dropping or increasing by up to 50-70% cals / changing nutrient ratios to favour a super high carb then super low carb (with fat remaining semi constant therefore changing protein) for just 1 or 2 days in the week? EG Mon - Fri = 2500, Sat = 1500 (10% carb), Sun = 3000-3300 (50%-70% carb) ?