TFC

THE MALE BODY TYPES

Endomorphs: 
Men with a sturdy, rounder bone structure: wider hips, stocky limbs, and a barrel-shaped ribcage.

Mesomorphs: 
Men with a broader, more triangular bone structure: narrower hips and broader shoulders.

Ectomorphs: 
Men with a slighter, more rectangular bone structure: longer limbs, thinner bones, and a flatter ribcage

An ectomorph or Endomorphs become a mesomorph?

A person likely cannot change their body type purely from something like being an ectomorph to a pure mesomorph, but an ectomorph can absolutely gain more muscle and bulk up with the right diet and right exercise routine