Once an Endomorph Always an Endomorph? (Can Your Body Type Change?) Are you an ectomorph, mesomorph or endomorph body type? To maximize your results, regardless of whether your goal is fat loss or muscle gain, it's helpful to know your body type and adjust your approach according to your type. But a big question that almost no one has ever answered is, "Does your body type change over time?" If so, then what? Do you have to totally change your nutrition and training again? And if your body type doesn't change, does this mean you are stuck being a fat endomorph for the rest of your life, doomed because of genetics? Read on to find out. Somatotype is a 3-part, 7-point body type rating scale developed by a guy named Sheldon back around 1940 or so. Ectomorphs are the linear, bony, lean types, mesomorphs are the naturally muscular body types (yeah, the ones we hate!), and endormorphs are the ones with the round body shapes and the genetic ...