ECTOMORPH
Introduction to the Ectomorph Somatotype The systematic classification of human physique, known as somatotyping, provides a framework for understanding the biological variability inherent in populations. Originally formalized by William Sheldon in the 1940s, this system posits three fundamental components of body type: endomorphy (softness and roundness), mesomorphy (muscularity and squareness), and ectomorphy (leanness and linearity). […]