Every person have different body response on the way they store or burn fat. The ectomorphs are usually called skinny fat for they have low weight but relatively have high body fat. However, they are good in burning fat easily so they end up having little observable body fat.
The other body type is the endomorph that has high tendency to store body fat resulting to have big body because their genetic make-up limits their ability to put on muscle mass.
Lastly, people with mesomorph type can build muscle quickly. They have generally softer and rounder body with responsive muscle cells that tend to store fat easily.
