An ectomorphic somatotype is naturally thin with skinny limbs with stringy muscles. Think of a person whose body type resembles that of an endurance athlete. These are the people whose body is thyroid dominant—meaning they have a fast metabolism and a higher carbohydrate tolerance. Growing up I found myself in this category but knew nothing about it. For me it would have been easier to eat more carbohydrates, but instead I found myself consuming all things protein.
• Small frame and bone structure
• Long and stringy muscles
• Flat chest
• Thin shoulders with little width
• Difficult to gain weight
• Fast metabolism
Usually ectomorphs find it very difficult to gain weight because of their fast metabolisms. Ectomorphs can usually lose body fat easily with small changes to diet though, making it extra difficult to hold on to valuable lean muscle mass.
The mesomorphic body is naturally muscular. The people with an athletic frame find it easier to build muscle because they tend to be testosterone and growth-hormone dominant—meaning they tend to hold on to lean muscle although they gain fat more easily than ectomorphs.
• Naturally muscular
• Well-defined muscles
• Rectangular-shaped physique
• Easy to gain muscle
• Easier to gain body fat than ectomorphs
The mesomorph body type is a great platform for a bodybuilder or physique competitor. Mesomorphs naturally have larger muscle that can easily be built upon.
A endomorphic somatotype is naturally broad and thick. The main characteristics are being insulin dominant, having a slow metabolic rate, and low carbohydrate tolerance. Their body structure is one of a wider waist and larger bone structure. They are heavily muscled yet carry extra body fat around the midsection.
• Soft round body
• Shorter “stocky” build
• Round physique
• Thick arms and legs
• Difficult to lose body fat
• Slow metabolism
Because of the endomorph’s low carbohydrate(why we need carbohydrates? Read here) tolerance and insulin-dominant characteristics, they often find it very difficult to lose body fat, especially in the central region (abdominal and lower back).