Fight camp nutrition: the complete guide
A camp is a performance programme that contains a weight cut. Not a diet that happens to contain training. Fighters who get that the wrong way round look sharp in the gym in week three and arrive at fight night already empty.
Eight weeks of 2 sessions a day, sparring, strength work, weight management and recovery. All at once. The body is being asked to perform, adapt and repair simultaneously. Without structure, that process fails quietly: recovery slows, output drops, and injuries start arriving in the weeks where the work matters most.
Everything below in order, from base camp to the walk. Each section opens into a full article.
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The three mistakes that cost the most
Treating camp like a diet. The primary job of camp nutrition is fuelling the work. Weight management is one component inside that, not the purpose of it.
Fighters who approach camp mainly as a time to eat less arrive underpowered, undermuscled and slow to decide.
Eating without structure around training. What goes in before a session decides the quality of that session. What goes in after decides how much of it your body keeps. Eating reactively. Whenever hungry, whatever is nearby.
Leaves adaptation on the table every single day of camp.
Eating the same regardless of the day. A 2-session sparring day and a rest day have completely different demands. Eat identically on both and you are either underfuelled on the hard days or overfuelled on the easy ones.
Usually both, alternating.
The three phases
Camp runs in three phases with different jobs, and the nutrition changes with each.
Base camp, 8–5 weeks out. Moderate deficit, full hydration, protein held high, carbohydrate generous enough to support a rising training load. This is where the majority of real weight should come off: slowly, at up to about 1% of body weight per week.
Nothing dramatic happens here, and that is the point.
Active camp, 4–2 weeks out. The deficit deepens and carbohydrates come down, but hydration stays full and sodium stays normal, this is the highest-intensity block of the camp, with the highest sweat losses, and it is the wrong week to be short of either. Training is at its peak here, so the phase is a balancing act rather than a diet: take too much out and the sparring that decides the fight gets worse.
Final week, 7–1 days out. Carbohydrates low, zero added sodium, water still high through the first part. This week prepares the body to release water on schedule, removes no fat, and belongs to the weight cut rather than to camp nutrition.
The detail is in the weight cutting guide.
Before any of the targets below make sense, you need to know how much energy is actually left after training. Protein is the one target that holds steady through every phase. It protects muscle while you are in a deficit and training twice a day, which is the entire reason a fighter can lose weight without losing power. Calories, carbohydrate and fat all move with the phase.
Hard days, moderate days, rest days
The single highest-value change most fighters can make is to stop eating one generic diet and start matching intake to the day.
Hard days: 2 sessions, sparring, or heavy strength work. Carbohydrate goes up, timed around the sessions. That carbohydrate is the fuel that makes the session count, and nothing to feel guilty about.
Moderate days, one session, technical work. Middle of the range.
Rest days. Carbohydrate comes down, protein stays, total energy drops. Rest days are where the weekly deficit is actually created, which is why they are not "cheat days" in either direction.
Done properly, this means the weekly total lands where it needs to be without any single day being punishing. Done badly. The same intake every day.
You get chronic underfuelling on the days that matter and unnecessary surplus on the days that do not.
Around training
Before. Familiar carbohydrate, low fat, low fibre, far enough ahead that the gut is not still working when the session starts.
What works is what you have tested; fight camp is not the time to discover a new pre-workout meal.
After. Carbohydrate to begin refilling what the session emptied, protein to support repair. The window is less dramatic than supplement marketing suggests, but on a 2-session day it genuinely matters, because the second session is fuelled by what you did after the first.
Between. On double-session days the gap between sessions is part of the plan, and it decides whether session two is real training or damage limitation.
Hydration through camp
Fighters spend fight week thinking about water and the previous 7 weeks ignoring it. That is backwards. A fighter who trains dehydrated for 2 months trains worse for 2 months, and arrives at the cut with no margin.
Full hydration through base camp and active camp does not fight against the weight cut. It is what makes the final week work. The body's response to consistent high intake is exactly what the last phase relies on.
Manipulating water is a fight-week tool, not a camp-long habit.
Supplements in camp
The rule in every camp I have run: nothing enters that is not certified by an independent batch-testing programme, and everything that enters is logged with its batch number and date.
The reason is practical. Contamination rates are highest in exactly the categories fighters reach for under fatigue. Pre-workouts and fat burners. And under strict liability the consequences land on the athlete regardless of intent. The full reasoning is in can a supplement make you fail a drug test, and any specific product should be checked on Global DRO and in the Informed Sport or NSF Certified for Sport registries before it goes in the bag.
Travel and away camps
Plans survive at home and fall apart abroad. Different food, different timing, a kitchen you do not control, and a body dealing with time zones on top of training load. This is where a fighter loses a week of camp without anything obviously going wrong.
And it needs planning before you get on the plane, not after.
What stays out
Not a moral list. A short practical one: anything that upsets the gut close to training, anything untested introduced during camp, alcohol during the deficit phases, and any product whose contents you cannot verify.
The last one is the only item on this list that can end a career rather than a session.
Two complete sample documents are free to read before you buy anything.
Oleksandr Foka is a sports nutritionist with over a decade in professional sport. He wrestled freestyle from the age of 4 until he was 22, competing as a medallist and champion at Ukrainian and international level, and has worked with amateur boxers since 2017, including champions and medallists at world championships. He has worked in world title camps in boxing with Oleksandr Usyk, Oleksandr Gvozdyk, Denys Berinchyk, Vladyslav Sirenko, Murodjon Ahmadaliev, Israil Madrimov, Sergiy Bogachuk, Sabirzhan Akkalykov and Abylaikhan Zhussupov, and with the Kazakhstan national boxing team and with Kazakhstan judo athletes, and currently works on the WTA tour. He builds weight management, camp nutrition and anti-doping as one system.
The same method runs for people who are not competing at all, on the private programme.
Oleksandr Foka — sports nutritionist. Questions: fokaoleksandr@gmail.com
Educational content, not medical treatment. For adults 18+. Individual energy and nutrient needs vary; the structures described here are templates to build from, not prescriptions. Nothing here replaces care from a physician or a qualified dietitian.