Revision summary
Somatotype rates roundness, muscularity, and linearity. Sheldon began with photos; Heath and Carter used anthropometry. Skinfolds feed endomorphy; bone and girth feed mesomorphy; ponderal index feeds ectomorphy. Scores are written as three numbers on a somatochart. Use it for sport and growth, not for temperament.
Model answer
Introduction
An anthropometric somatotype is a three-number rating of physique from body measurements. Heath and Carter made Sheldon’s idea operational without photographs as the main tool.
Body
Somatotype as an idea
- Sheldon scored endomorphy (roundness), mesomorphy (musculo-skeletal robustness), and ectomorphy (linearity) from photos.
- The method was criticised as subjective and politically misused. Sport and growth studies still needed a body-shape index.
Heath–Carter method
- Barbara Heath and J. E. L. Carter published equations using height, weight, skinfolds (triceps, subscapular, supraspinale, medial calf), biepicondylar humerus and femur, and flexed arm and calf girths corrected for skinfold.
- Endomorphy comes mainly from the three skinfolds, adjusted for height.
- Mesomorphy uses bone breadths and corrected girths against height.
- Ectomorphy uses the ponderal index (height over cube root of weight).
- The result is written as X–Y–Z, for example 2–5–3, and plotted on a somatochart.
Use and critique
- Sports anthropology in India uses it to compare throwers, distance runners, and controls.
- It is a phenotype now, not a temperament. Sheldon’s psychiatric claims are dropped.
- Limits: operator error on skinfolds, age and fat change, and the fact that a number is not a destiny.
Flow diagram
flowchart TD SH[Sheldon photo types] --> HC[Heath Carter measures] HC --> EN[Endomorphy folds] HC --> ME[Mesomorphy bone girth] HC --> EC[Ectomorphy ponderal]
Conclusion
Heath–Carter somatotype is a measured endomorphy–mesomorphy–ectomorphy triad. It replaced photo-guessing with girth, bone, fold, and ponderal index, and it belongs in kinanthropometry, not in characterology.
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