The peak week protocol, day by day

The peak week protocol is the one week of prep a coach cannot run on autopilot. The client is lean, the margin is thin, and most of the decisions land inside the final 48 hours. This page structures the week from seven days out, labels every lever for whether the evidence supports it or the coaching room does, and states in plain words where the coach's job stops.

The definition comes first and lives elsewhere. What peak week is and where the scope line sits is the reference entry, and this page assumes it rather than repeating it. If the phase is new to you, read that one first. Everything below is built on the distinction it draws between programming the look and owning the safety.

What peak week actually changes

The order they move in matters more than the size of any single change, and so does the discipline of moving one at a time. A week where three levers change on the same day produces a result nobody can attribute to anything.

The evidence base is uneven, and the unevenness is the useful part. Glycogen storage and fluid balance are well described. The claim that manipulating them reliably changes how a client looks on stage is far weaker than the coaching room implies. A 2021 review in BMC Sports Science, Medicine and Rehabilitation is blunt about it: the literature behind the typical peaking week is thin, and population-wide recommendations are not possible for a group whose responses vary this much.

So every lever on this page carries a label. Evidence where trials and reviews support the mechanism. Convention where the practice is passed between coaches and recorded in surveys but never tested against an outcome. Some sit in both camps, with solid physiology and a stage result nobody has measured. A coach who cannot tell those apart is guessing at the highest-stakes moment of the prep.

The order of operations

Training comes down first, because fatigue masks the look and no amount of carbohydrate shows through it. Carbohydrate moves next, because glycogen takes days to fill. Water and sodium move last, and only when the coach has decided to touch them at all, because that is the point where the week stops being a nutrition decision and becomes a medical one.

The sequence is really about measurement. In the final week the coach reads a daily photo and a morning weight, and each change needs roughly 24 hours before it shows in either. Move two levers on the same day and you learn nothing about either one. That is the whole argument for one variable at a time, and it is the recommendation every credible source makes.

The training side of the week is a taper Both, and the general method belongs to the training taper entry rather than this page. What changes here is the compression. Volume drops harder, intensity holds longer, and the last real session lands earlier in the week than a general taper would place it. The shape is convention. The principle underneath it, that fitness is retained while fatigue clears, is evidence.

One rule sits above the whole order. Nothing new goes in during the final week. A supplement, a food, a training method the client has not used before: all of it waits. The last week is for running a tested plan, not for finding one.

The day-by-day protocol

The table below is a structure, not a prescription. It shows the shape of the week, what tends to move on each day, and what the coach is reading. The numbers are deliberately missing, because the literature reports ranges rather than doses, and a range only becomes a plan after a test run.

Read the table with those labels in mind. The training column is the most evidence-aligned part of the week. The carbohydrate column rests on solid physiology with a thin outcome literature behind it. The water and sodium column is almost entirely convention, and it is the one with a documented risk attached.

Two rows carry more weight than the rest. The D-4 decision is where the coach chooses how many variables to move, and the honest answer is usually fewer than the plan says. The D-1 row is where a protocol stops being a plan and becomes a medical call, which is why it belongs in a written conversation with the client before the week starts rather than in a message on the morning.

One more thing belongs at D-7 rather than in the table. If the client is not lean enough a week out, the protocol cannot fix it, and no manipulation later in the week will either.

Carbohydrate manipulation: the evidence, the range, and who it fails

Carbohydrate is the lever with the best physiology behind it and the weakest outcome data in front of it, which makes it the clearest both on the page. A 2024 narrative review in Sports Medicine - Open is the current reference point, and it recommends loading with 3 to 12 grams per kilogram of bodyweight to raise muscle glycogen. The range is wide on purpose. It reflects differences between individuals and between divisions, and the review does not pretend one number fits a 60 kg competitor and a 105 kg one.

Two findings from that review change how the week is usually run. The first is that depleting glycogen before loading looks unnecessary. The classic depletion phase, days of near-zero carbohydrate followed by a refeed, may add nothing a straightforward load does not. The second is that front-loading works. A competitor who loads at the start of the week keeps the supercompensated glycogen for up to five days, which leaves the back half of the week free for adjustment instead of committed to a plan.

Where it fails is worth naming, because the failure modes are predictable. Loading does not create muscle that is not there, so a client who arrives at the final week under-conditioned mostly holds more water. Gut tolerance is individual, and a client who has never eaten that volume of carbohydrate in a day may spend the week bloated rather than full. The absolute number matters as much as the per-kilogram one, which is another argument for the test run.

Every figure here is a reported range to individualise. None of it is a dose to hand a client on a Tuesday.

Water and sodium: the convention, the evidence, and the risk

This lever has the least evidence and the most risk, and the two facts are connected.

The 2021 review documented what the practice actually looks like. In a survey of 81 natural bodybuilders, 93.8% reported using a peaking strategy in the week before competing, and the common versions combined carbohydrate, water and sodium manipulation. Reported water intakes ranged from 4 to 12 litres a day, usually followed by restriction for 10 to 24 hours before the show. The same review records that the athletes' own assessments of whether the water and sodium work were, at best, mixed.

The 2024 review goes further and advises against aggressive restriction of either. Cutting sodium can slow intestinal glucose uptake, because sodium is what carries glucose across the gut wall. Restricting water and sodium together may reduce muscle size and vascularity and impair the carbohydrate load, which is the opposite of the intended effect. Dehydration lowers total muscle water, and a lower blood volume delivers less glucose to the muscle. A coach who cuts hard on both is working against the lever they just pulled.

For a client who has never tested any of it, the position the 2021 review suggests is the sensible one: hold water relatively constant, hold sodium constant, and treat the final week as a refinement of the carbohydrate and training plan instead of a fluid experiment.

Prescription diuretics are not a coaching tool. They are named here for one reason only: a coach who is asked about them refers the client out. Both papers carry case reports of what happens otherwise. In the 2021 review, one bodybuilder was hospitalised after using furosemide at 24 and 48 hours before a show and losing five to six kilograms of bodyweight overnight, arriving with severe hypokalaemia. Another presented to an emergency department with hyperkalaemia, hyponatraemia and rhabdomyolysis after seven days at 12 litres of water a day alongside spironolactone and deliberate salt depletion. Those are medical events. The person who manages them is a doctor.

Write the line down and give it to the client before the week starts. The coach programmes the look. The client's doctor owns the safety.

Mock peak weeks: why you test the protocol before the real one Evidence

The most consistent recommendation across both reviews and the coaching corpus is not a manipulation at all. It is to run the week once before it counts. This is the rare part of peak week that the published evidence and the coaching room agree on completely.

The 2021 review suggests a practice run two to four weeks before the competition. The 2024 review is more specific about the conditions: trial the strategy in a physiological state as close to peak week as possible, ideally well before the show, once the client is already lean and the variables in play are the real ones. Both reviews repeat the same instruction in different words, which is to manipulate as few variables as possible.

A mock week answers questions that reading cannot. Does this client's gut tolerate that carbohydrate volume, and does the look fill out or flatten on day three? Does the weight respond the way the plan assumes? And the question coaches skip: does the client cope with the attention the week demands?

It also changes the risk profile of the real week. A tested protocol is a known quantity, so the coach is adjusting rather than discovering. The mechanism that captures the test is the check-in loop, and the prep check-in guide covers what the daily record has to hold for that comparison to mean anything.

Supplements in peak week Convention

Peak week is the worst week of the prep to introduce a supplement, and it is the week clients ask about them most. The lever itself is convention, with no outcome evidence behind it at all.

Our own platform data gives the coach-side picture. In a randomised audit of 1,000 coaches, 68% recommend at least one supplement category to clients, most often protein, creatine or a recovery product, and the remaining 32% take a deliberate position of recommending none. That finding sits in what online coaches actually recommend, and it describes practice rather than endorsing it.

This page carries no doses, no products and no stacks, and that is a scope decision rather than an oversight. Anything a client takes in the final week to change how they look is either a food decision, which belongs to the coach and the client, or a pharmacological one, which belongs to a doctor or a registered dietitian. A supplement marketed for water shedding falls in the second group, and the referral is the coaching move.

The daily check-in loop that carries the week

Remote delivery compresses the feedback loop and widens the risk window at the same time. The coach is not in the room. What they have is yesterday's photo, this morning's weight, and whatever the client chooses to write.

That makes the check-in cadence the tripwire for the whole week. Daily photos replace the weekly set, because the final days are where the look is decided. The questions shrink to the essentials: energy, sleep, how the client feels, anything unusual. The response window shrinks too, because a question asked at 6am on show day cannot wait until Monday. The mechanics of that loop are set out in how online coaching client check-ins work.

The software side is unglamorous and it matters. Physique prep coaching software earns its place in this phase by holding the photo series, the weight trend and the food log in one history, so the coach reading day five can see day one without scrolling a message thread for it.

One caveat about the data itself. A single morning weight in peak week is mostly noise, and a single photo is mostly lighting. Read both against the previous three days, or do not read them at all.

When peak week is not the problem

Some weeks are not a protocol problem. They are a medical one, and the coach's job is to notice and refer.

The referral triggers are specific enough to write down. A client with a known kidney or heart condition, or any medication that affects electrolytes or blood pressure, needs medical clearance before the week starts rather than a coach's judgement during it. A history of disordered eating is a referral to a doctor and to a psychologist or a dietitian experienced in that area, because a week built on food and fluid control is a known risk period. Pregnancy takes the fluid levers off the table and belongs with the client's obstetric care. Any acute illness, fainting, dizziness or confusion in the final week is a stop-and-refer event rather than an adjustment.

None of that is a comment on the coach's competence. It is the boundary the scope of practice entry sets out in full, and peak week is where it stops being theoretical.

There is a second kind of week that is not a protocol problem either. A client who is not lean enough does not need a better peak. They need an honest conversation about the show date, a softer condition on the day, or a later show. A coach who reaches for the protocol instead turns a disappointing result into a dangerous one.

The week after the show matters as much as the week before it, and reverse dieting after the show covers that phase. The rest of the library, from programming methods to credentials, sits in all coaching guides.

Frequently asked questions

How much carbohydrate does a prep client need in peak week?

The current review range is 3 to 12 grams per kilogram of bodyweight, which is deliberately wide because individuals and divisions differ. Treat it as the range the literature reports, pick a point inside it for the individual client, and only after the protocol has been tested in a mock week.

Should I cut water and sodium?

Only if it has been tested, and often not even then. Aggressive restriction can reduce muscle size and vascularity and impair the carbohydrate load, which defeats the point. For an untested client, the safer route the evidence suggests is to hold water and sodium constant and refine carbohydrate and training instead.

What if the client flattens or spills over on the day?

Both are read from the photo, and both are late. A flat look usually means the carbohydrate did not land or the client is under-hydrated; spilling means too much of it arrived without the training stimulus to use it. On the day, the coach adjusts within what has already been tested.

Shorter versions of these, and the questions prep coaches ask about cut length and macros, are collected in the peak week questions our prep hub answers in 40 to 55 words each.