How many categories are in the somatotype system for classifying the human body?

The somatotype system classifies human bodies into three distinct categories: ectomorph, mesomorph, and endomorph. Each category is characterized by specific physical traits and body compositions. Ectomorphs typically have a slim build with narrow shoulders and hips, possessing a higher metabolism and lower body fat percentage. Mesomorphs are characterized by a more muscular and defined physique, with broad shoulders and a naturally athletic build. Endomorphs have a rounder, softer body shape with a higher body fat percentage and wider waist.

By dividing the human body into these three categories, the somatotype system allows for a more straightforward understanding of body types and can help tailor fitness programs to the individual needs of clients based on their predominant somatotype. This classification is useful in various fields, including fitness, health, and sports science, as it can help in designing effective training and nutrition plans that align with a person's natural body characteristics.