Julie, having an ectomorph body type, means she is tall and thin with long arms and legs. This body type is characterized by a lean and slender build, narrow shoulders and hips, a fast metabolism, and a lower percentage of body fat and muscle mass. People with this body type have a naturally smaller bone structure and find it challenging to gain weight or muscle despite eating a lot. Common traits include long limbs, a narrow frame, and often a delicate bone structure.