There are 3 generalized body types (somatotypes) you may have heard of.
The idea of having a specific body type was documented by William Herbert Sheldon, a psychologist in the 1940’s. Although his psychological theories were highly criticized, many fitness and nutrition professionals have adopted the somatotype theory in their practice (1). Although many of us are a combination of these body types, you may find yourself leaning towards one of the three.
Ectomorph - Thin and lengthy build. Has difficulty putting on muscle and fat. Small joints. Has difficulty gaining weight. Narrow hips and shoulders. Maintains weight easily
Mesomorph – Muscular build. Gains and loses weight easily. Narrow waist and wider shoulders. Builds muscle easily.