The practice of developing the body’s musculature through progressive resistance training combined with precise nutrition, pursued both as sport and as personal discipline. Competitive bodybuilders are judged on muscle size, symmetry, and definition, preparing through cycles of building mass and then dieting to extreme leanness for the stage. The nutritional demands are formidable: high protein intakes to support muscle synthesis, carefully managed calories for each phase, and attention to micronutrients often neglected in restrictive contest diets. The sport’s extremes carry health costs, from disordered eating patterns to the organ damage of performance-enhancing drugs used by some competitors. At its healthy core, though, bodybuilding demonstrates the body’s remarkable adaptability when training and nutrition are aligned with patience and consistency.