These body type classifications have their roots in discredited pseudoscience—but they're still common shorthand at the gym.

An ectomorph is a human somatotype (body type) that is typically tall and lean with smaller muscles, narrow shoulders, and narrow hips. This body type has a naturally fast metabolism, which can ...

However, that can also make it much more challenging for them to increase muscle, so ectomorphs hoping to work towards a sculpted physique may struggle. Skip to the diet and exercise tips for ...