The gap between popular belief about fighter nutrition and the reality is significant. Crash dieting to make weight remains disturbingly common. But at the elite level, teams have adopted sports science with impressive rigour.
The weight class problem
Most professional fighters compete below their natural walking weight. The cut — reducing weight through water depletion in the days before weigh-in — is the open secret of combat sports. When managed correctly, with precise rehydration protocols, it provides a size advantage at fight weight. When mismanaged, it impairs performance and carries genuine health risks.
ONE Championship's elimination of same-day weigh-ins at most events has reduced extreme cuts and produced better athletic performances. The UFC's hydration testing, introduced incrementally, moves in the same direction.
Training camp nutrition
During camp, elite fighters typically consume:
*High protein* — 2.0 to 2.4 grams per kilogram of bodyweight. Muscle repair and retention under the double stress of weight management and intensive training requires consistent protein distribution across five to six meals.
*Carbohydrate periodisation* — higher carbohydrate intake on hard training days, lower on rest and lighter days. This approach preserves muscle glycogen for high-intensity work without unnecessary caloric surplus.
*Strategic fats* — omega-3 supplementation for inflammation management is near-universal in elite MMA camps. Fish oil, high-EPA varieties, at doses of 3 to 5 grams daily.
Supplementation reality
The supplement industry targeting fighters is large and poorly regulated. Evidence-based options are far fewer than marketing suggests: creatine monohydrate for explosive power output, caffeine for focus and endurance, beta-alanine for high-intensity work capacity, and vitamin D3 for athletes training indoors. Everything else requires careful scrutiny of the evidence base.
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