Nutrition provides the foundation for strength and muscle gains. Current evidence suggests 1.6–2.2 grams of protein per kilogram of body weight per day for optimal muscle protein synthesis, with intake spread across 3–5 meals of 20–40 g per serving to maximize the anabolic response. Carbohydrates are the primary fuel for high-intensity exercise, replenishing muscle glycogen stores, with 3–7 g/kg/day (depending on training volume) supporting performance, recovery, and prevention of muscle protein breakdown. Dietary fats support hormone production (including testosterone), cell membrane integrity, and absorption of fat-soluble vitamins A, D, E, and K, with a minimum of 0.5–1 g/kg/day generally recommended.
Caloric balance determines whether one gains or loses body mass. A caloric surplus of about 250–500 calories per day provides the energy needed to build new muscle tissue while minimizing excessive fat gain. A caloric deficit, where intake is below expenditure, is used during cutting phases to reduce body fat while attempting to preserve lean muscle mass.
Among supplements, creatine monohydrate is the most researched and effective for strength and power, increasing phosphocreatine stores in muscle to improve ATP regeneration during high-intensity efforts at a standard dose of 3–5 g/day. Protein powder (whey, casein, or plant-based) is convenient but not essential, helping reach daily targets when whole-food intake is insufficient. Caffeine, taken at 3–6 mg/kg 30–60 minutes pre-workout, can improve strength, power output, and reduce perceived exertion by stimulating the central nervous system, making it one of the most effective legal ergogenic aids.