Body Type Quiz: Discover Your Unique Somatotype – Endomorph, Ectomorph, or Mesomorph?

Our body type quiz asks nine questions about how your body looks today and shows which build you look closest to: endomorph, mesomorph, ectomorph, or a combination of body types. With ten measurements from a trained measurer, the Measured mode rates your somatotype as three numbers, for fat, muscle and bone, and slenderness.

A somatotype describes the shape and composition of your body today. This article covers where the idea came from, what each type means, and what research has found about build, strength and health.

Somatotype Theory: A Modern Perspective

From Sheldon’s Typology to Modern Analysis

In the 1940s, psychologist William Herbert Sheldon introduced somatotypes: ectomorph, mesomorph, and endomorph. Sheldon built his system on a link between body type and character. Today the three terms describe the body alone: endomorphy is relative fat, mesomorphy is muscle and bone for your height, and ectomorphy is how slender you are. While groundbreaking, Sheldon’s theory has evolved significantly.

Sheldon’s original theory included some controversial elements, such as:

• Associating body types with personality traits
• Using questionable methods for data collection
• Making inaccurate assumptions about physical characteristics

Modern somatotyping, the Heath-Carter method, rates the present shape and composition of the body from ten measurements and leaves personality out (7, 8). The rating changes when your fat, muscle or weight changes.

Understanding the Three Primary Somatotypes

Everyone has some of all three. The descriptions below fit someone high in one rating, and none of them predicts how you will respond to training: on the same program, people gain anywhere from no muscle to a lot (5).

Endomorph: The Rounder Build

Key Characteristics:

• Thicker skinfolds on the arms, back and hips
• Higher body fat percentage
• Looks soft when relaxed

Advantages:

• Common in sport alongside muscle: a 2025 review of 66 studies found male elite athletes were most often endomorphic mesomorphs, with mesomorphy highest and endomorphy second (3)

Challenges:

• In a study of 774 workers, high blood pressure and liver disease were most common in those highest in endomorphy and mesomorphy (2)

Mesomorph: The Muscular Build

Key Characteristics:

• Athletic build
• Larger frame and muscles for their height
• Balanced muscle-to-fat ratio

Advantages:

• Linked with strength: in a study of 36 active men, mesomorphy correlated with bench press and back squat strength (1)

Challenges:

• A muscular build is no guarantee of strength: in that study, build predicted about a third of strength performance (1)
• High mesomorphy, like high endomorphy, went with more high blood pressure and liver disease in the study of 774 workers (2)

Ectomorph: The Slender Build

Key Characteristics:

• Slender build
• Low body fat percentage
• Smaller joints and bone structure

Advantages:

• Naturally lean physique

Challenges:

• In the study of 36 active men, higher ectomorphy went with a weaker bench press and back squat (1)

Beyond the Basics: Understanding Mixed Somatotypes

It’s crucial to understand that pure somatotypes are rare. Most individuals exhibit a blend of characteristics from multiple body types. Our body type quiz scores fat, muscle and bone, and slenderness out of 6 each. If all three scores sit within a point of each other, it says Balanced; otherwise it names the build with the top score, or both builds when the top two tie, such as mesomorph-ectomorph.

Your blend describes your build today. It does not set your diet or your training. People also gain muscle at very different rates: on one 12-week arm training program, biceps size changed by anything from -2% to +59% across 585 adults (5).

Several factors contribute to your body type combination:

• Genetic predisposition
• Dietary habits
• Training history
• Lifestyle factors

Diet, training and lifestyle change over time, so your blend can change too.

Scientific Evidence: Somatotypes, Performance and Health

The two studies below compared somatotype with strength and with disease. Each measured people once, so they show links, not causes, and neither tested training or eating by body type.

Somatotypes and Athletic Performance

A 2018 study rated the somatotypes of 36 physically active men and tested their strength:

1. Strength and Power: Mesomorphy correlated moderately with bench press and back squat strength (r = 0.56 and 0.55), and build as a whole predicted about a third of strength performance (1).
2. Lower Body Strength: Ectomorphy pointed the other way: a higher rating went with a weaker back squat, r = -0.34 (1).

Somatotypes and Health Considerations

Two points on health:

1. Disease: Individuals with dominant mesomorphic or endomorphic traits had high blood pressure and liver disease more often in a study of 774 workers, and the authors advised body weight control (2).
2. Metabolism: We found no study linking a somatotype to metabolism. Resting energy use follows mostly fat-free mass, then fat mass and age (4).

Training and Eating by Goal, Not by Body Type

We found no study that tested training or eating by somatotype, so the advice below is sorted by goal.

If Your Goal Is Fat Loss

• Eat fewer calories than you burn. Interval training and steady cardio both add to the deficit.
• Focus on compound movements for optimal resistance training results.
• Choose nutrient-dense, lower-calorie foods to manage weight effectively.

If Your Goal Is All-Round Fitness

• Implement periodized training to overcome plateaus and ensure continuous progress.
• Balance strength training with cardiovascular exercise for a well-rounded fitness approach.
• Maintain a balanced macronutrient intake to achieve and sustain an ideal body composition.

If Your Goal Is Muscle Gain

• Emphasize progressive overload for effective resistance training and muscle growth.
• Increase caloric intake with nutrient-rich foods to support muscle development.
• Prioritize recovery to facilitate muscle growth and prevent overtraining.

For Every Build

• Do muscle-strengthening work for all major muscle groups on 2 or more days a week, as the WHO advises for every adult (6).
• Regularly assess and modify your strategy to adapt to changes in your body composition.
• Expect your own pace: people on the same program gain very different amounts of muscle (5).

Beyond Body Types: Unlocking Your True Potential

Your somatotype describes your build as it is today. Factors such as nutrition, training consistency, sleep quality, and overall lifestyle play crucial roles in achieving your fitness goals.

Remember:

• Body type is a starting point, not a defining limit.
• Your rating changes as your fat, muscle and weight change.
• Regular self-assessment and adaptation are essential for sustained success.

Take Action: Discover Your Unique Body Type

Take the body type quiz above to see which build you look closest to, or switch to Measured if you have your ten measurements. The next steps on your result stay the same for every build: find your maintenance calories, set your daily protein and lift weights on two or more days a week.

Helpful Fitness Tools: Resources to Enhance Your Journey

Explore these valuable tools to support your fitness goals:

• TDEE Calculator
• Carb Cycling Calculator
• Intermittent Fasting Calculator
• Protein Intake Calculator
• Macronutrient Calculator
• Weight Gain Calculator
• Weight Loss Calculator
• Calorie Deficit Calculator
• Shoulder to Waist Ratio Calculator

Dive Deeper into Body Type Science

Expand your understanding with these in-depth articles:

• Comprehensive Guide to Male Body Types (Ectomorphs, Mesomorphs, and Endomorphs)
• Understanding and Addressing the Skinny Fat Physique
• The Science of Getting Shredded: Timelines and Strategies

References

Fitness Volt is committed to providing our readers with science-based information. We use only credible and peer-reviewed sources to support the information we share in our articles.

1. Ryan-Stewart H, Faulkner J, Jobson S. The influence of somatotype on anaerobic performance. PLoS One. 2018 May 22;13(5):e0197761. doi: 10.1371/journal.pone.0197761. PMID: 29787610; PMCID: PMC5963773.
2. Koleva M, Nacheva A, Boev M. Somatotype and disease prevalence in adults. Rev Environ Health. 2002 Jan-Mar;17(1):65-84. doi: 10.1515/reveh.2002.17.1.65. PMID: 12088094.
3. Martínez-Mireles X, Nava-González EJ, López-Cabanillas Lomelí M, et al. The Shape of Success: A Scoping Review of Somatotype in Modern Elite Athletes Across Various Sports. Sports (Basel). 2025;13(2):38. doi: 10.3390/sports13020038. PMID: 39997969; PMCID: PMC11860359.
4. Johnstone AM, Murison SD, Duncan JS, Rance KA, Speakman JR. Factors influencing variation in basal metabolic rate include fat-free mass, fat mass, age, and circulating thyroxine but not sex, circulating leptin, or triiodothyronine. Am J Clin Nutr. 2005;82(5):941-948. doi: 10.1093/ajcn/82.5.941. PMID: 16280423.
5. Hubal MJ, Gordish-Dressman H, Thompson PD, et al. Variability in muscle size and strength gain after unilateral resistance training. Med Sci Sports Exerc. 2005;37(6):964-972. PMID: 15947721.
6. Bull FC, Al-Ansari SS, Biddle S, et al. World Health Organization 2020 guidelines on physical activity and sedentary behaviour. Br J Sports Med. 2020;54(24):1451-1462. doi: 10.1136/bjsports-2020-102955. PMID: 33239350; PMCID: PMC7719906.
7. Carter JEL. The Heath-Carter Anthropometric Somatotype: Instruction Manual. San Diego State University; revised March 2002.
8. Heath BH, Carter JEL. A modified somatotype method. Am J Phys Anthropol. 1967;27(1):57-74. doi: 10.1002/ajpa.1330270108. PMID: 6049820.