Mesomorphs refer to body types with a naturally high muscle-to-fat ratio. People with this body type typically respond well to weight training, finding it easier than other people to build and maintain muscle. They are also able to lose weight easier than others.
Mesomorphs tend to be athletic and strong due to their high muscle-to-fat ratio, which might give them a muscular chest, shoulders, and limbs. Their weight distribution around the body is usually relatively even
Mesomorphs are typically strong and solid, not overweight or underweight. Their bodies may be described as rectangular in shape with an upright posture.