mesomorphic

Mesomorphic is a term from historical somatotype theory used to describe a naturally muscular, athletic-appearing body type. In classic descriptions, mesomorphs are said to have a broad shoulder girdle, a narrow waist and hips, a dense bone structure, and a high capacity to gain muscle with relatively little fat. They are often perceived as well suited to strength and power activities.

In this framework, mesomorphy sits between ectomorphy (lean, delicate, harder to gain mass) and endomorphy (higher body fat, wider hips). Modern science, however, treats somatotypes as descriptive labels rather than fixed categories, emphasizing that body shape exists on a continuum and is influenced by genetics, training, and diet. People often display a mix of traits rather than fitting neatly into one type.

In fitness and bodybuilding contexts, individuals described as mesomorphic are typically thought to respond well to resistance training and a balanced diet that supports muscle growth while managing body fat. They may benefit from a program that emphasizes progressive overload, compound movements, and adequate protein intake, though individual outcomes vary widely.

Criticism: The somatotype taxonomy is considered oversimplified and lacking rigorous scientific grounding for individual prescription. It remains a historical reference point in discussions of physique rather than a precise, predictive model.