Different body types, often classified as ectomorph, mesomorph, and endomorph, influence fitness and dietary needs significantly. Ectomorphs, typically slim and fast-metabolizing, may require high-calorie diets with ample protein to gain muscle. Mesomorphs usually have an athletic build and may benefit from a balanced intake of carbohydrates, proteins, and fats to support their muscle growth. In contrast, endomorphs, who tend to store fat more easily, often need to focus on lower-carb diets and engage in regular cardio exercises to maintain a healthy weight.