Ectomorph

The ectomorph body type is commonly associated with fast-twitch muscle fibers.

As an ectomorph, she struggles to gain muscle mass despite regular weightlifting.

The ectomorph runner had a natural advantage in long-distance races.

The genetic predisposition of being an ectomorph makes it challenging for him to put on weight.

The ectomorph actor underwent a drastic physical transformation for the role.

The ectomorph build gives him an advantage in activities that require agility and speed.