Peak week — what's actually supported

#The three manipulations, ranked by evidence

Carbohydrate depletion and reloading is the one manipulation here with genuine physiological grounding. Exhaustive, glycogen-depleting training followed by a predominantly carbohydrate diet produces measurable glycogen supercompensation — more glycogen stored in the muscle, and more of the water that comes bound to it, than a steady diet would produce. Documented protocols scale the loading phase to bodyweight over two to three days following a depletion phase of similar length, with full saturation estimated around 36–48 hours after the last depleting session. Ninety-one percent of a surveyed sample of competitive natural bodybuilders used some version of this.

Water and sodium manipulation is the practice most competitors trust most, and the evidence supports it least. There is a documented dearth of controlled evidence behind it, and it's considered unlikely that the manipulation meaningfully changes sodium-ion concentration enough to cause the fluid shift it's meant to cause. The historical version — load sodium hard for three days, then cut it completely for three days — is specifically reported to trigger an aldosterone rebound that produces the puffy, water-retained look the whole manipulation was trying to prevent. More recent practitioner guidance holds a normal baseline through prep and applies only a gentle taper in the final 48 hours.

Post-show refeeding gets almost no attention compared to the week that precedes it, and it carries a real, entirely non-pharmacological danger: refeeding syndrome. Severe prolonged restriction depletes intracellular phosphate, potassium and magnesium even while blood tests look normal; reintroducing carbohydrate triggers an insulin surge that drives those electrolytes rapidly back into cells, and a fast enough reintroduction can crash the extracellular level the same way it had been depleted — all at once. A published case describes a competitive bodybuilder who developed bilateral lower-limb paralysis after five months of inadequate nourishment followed by six days of carbohydrate overload.

#Self-explanation

In one sentence: why does the SAME mechanism — a large, fast carbohydrate reintroduction — help during a controlled reload and threaten to cause paralysis during an uncontrolled post-show binge?

(Nobody grades this. Writing the sentence is the point — it's the difference between "carb loading is good, binging is bad" as two unrelated facts, and understanding that they're the same lever pulled at two different speeds and starting points.)

#Retrieve

Full citations for every claim above: /protocol/showprep § Peak week.