Ectomorph is a term used to describe a body type characterized by a slender build and low body fat. It is often referred to as a 'BEANPOLE' due to its tall, thin stature. People with this body type tend to have long limbs and a narrow chest and hips. They also tend to have a fast metabolism, which can make it difficult to gain weight. Ectomorphs are typically good at endurance activities such as running and swimming, but may struggle with strength-based activities.