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

There are three main body types: ectomorph, mesomorph, and endomorph. The classifications can be applied to any body, regardless of sex, because they focus on how easily a person stores fat and ...

On the plus side, endomorphs tend to be able to build muscle broadly across their body quite quickly. “An endomorph should definitely do some weight training, I’d suggest eight-12 reps ...