The body types can be divided into 3 different groups: ectomorph, mesomorph, and endomorph. An ectomorph can be defined as the body type of a person that doesn’t gain weight regardless of the diet they have. It is one of the body types that are much leaner and fragile than the other body times. Amongst the three different somatotypes on the basis of which the body types are divided, ectomorphs tend to take the thinner side of the groups.