Wellness
What's Your Body Type? The Somatotype Guide
Learn about the somatotype theory, which classifies bodies into three types (ectomorph, mesomorph, endomorph) to tailor fitness and nutrition plans.
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What is it?
Somatotype theory, developed by psychologist William H. Sheldon in the 1940s, classifies the human physique into three fundamental types: ectomorph, mesomorph, and endomorph. Ectomorphs are characterized as being thin and lean, often struggling to gain muscle mass. Mesomorphs are described as naturally muscular and athletic with a medium frame. Endomorphs typically have a rounder, softer physique and a higher tendency to store body fat. Sheldon's original theory also linked these body types to specific personality traits, an idea that is now largely discredited by the scientific community.
Why is it trending?
Despite its controversial origins, the concept of somatotypes has been adopted by the fitness and wellness industries as a simplified framework for personalizing exercise and nutrition. The idea of "training for your body type" is popular because it offers a seemingly tailored approach to achieving fitness goals. Health blogs, social media influencers, and personal trainers frequently use these categories to provide specific recommendations for workouts and diet plans, making complex fitness science more accessible to the general public and helping people understand their body's natural tendencies.
How does it affect people?
People use their perceived somatotype as a guide to optimize their fitness and nutrition strategies. For example, someone identifying as an ectomorph might be advised to focus on heavy strength training and a high-calorie diet to build muscle. Conversely, an individual with an endomorph body type may prioritize cardiovascular exercise and a diet with controlled calories to manage body fat. While most people are a mix of these types and body composition can change, understanding one's dominant tendencies can serve as a practical starting point for creating a more effective wellness plan.