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Determine your biological somatotype profile (Ectomorph, Mesomorph, Endomorph) using the Heath-Carter anthropometric rating method and Ponderal Index body frame calculations.
Ponderal Index = Height (cm) / (Weight in kg)^(1/3).Ectomorphy = 0.732 × PI - 28.58.Ectomorphs have narrow bones, long limbs, fast metabolism, and difficulty gaining weight. Mesomorphs have broad shoulders, narrow waist, athletic frame, and gain muscle easily. Endomorphs have broader bone structures, slower metabolic rate, and store fat easily.
Yes. Virtually all humans are combinations (e.g. Ecto-Mesomorph or Meso-Endomorph). The Heath-Carter scientific method rates each individual on a continuous 1 to 7 scale across all three dimensions.
While your underlying skeletal bone dimensions and muscle insertion lengths are genetically fixed, targeted resistance training and nutrition can fundamentally shift your muscularity (mesomorphy) and body fat (endomorphy).
Ectomorphs generally possess higher insulin sensitivity and thrive on high-carbohydrate intakes (50–60% of calories). Endomorphs often do better with moderate-to-low carbs (25–35%) and higher dietary fats and protein.