Somatotypes

Somatotypes describe different body types based on the relative proportions of fat, muscle and bone. The Edexcel GCSE PE specification requires you to know the three somatotype categories — endomorph, mesomorph and ectomorph — their physical characteristics, and how each relates to performance in different sports. You must also understand that most people are a combination of types.

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The Three Somatotypes

The somatotype model was developed by William Sheldon in the 1940s. It classifies body types into three extremes, though in reality most people are a mixture.

graph LR
    A["Endomorph<br/>(Pear-shaped)"] --- B["Mesomorph<br/>(Athletic)"] --- C["Ectomorph<br/>(Lean/Slim)"]
    style A fill:#e53935,color:#fff
    style B fill:#f39c12,color:#fff
    style C fill:#1565c0,color:#fff

Endomorph

Characteristic	Detail
Body shape	Wide hips, narrow shoulders; pear-shaped
Fat distribution	Tendency to store fat easily, especially around the hips, thighs and abdomen
Muscle	Moderate muscle mass
Build	Short, stocky limbs; round body
Metabolism	Slower metabolism; gains weight easily

Sporting links: Sumo wrestling, rugby prop, shot put, discus, powerlifting (heavyweight). Endomorphs benefit from high body mass in sports where size and weight are advantageous.

Mesomorph

Characteristic	Detail
Body shape	Broad shoulders, narrow hips; V-shaped torso
Muscle	High muscle mass; gains muscle easily
Fat distribution	Low body fat percentage
Build	Athletic, muscular frame; medium-sized bone structure
Metabolism	Efficient metabolism; responds well to training

Sporting links: Sprinting, swimming, gymnastics, rugby (back row/centre), boxing, tennis, football. Mesomorphs are well-suited to sports requiring strength, speed and power.

Ectomorph

Characteristic	Detail
Body shape	Narrow shoulders and hips; long, thin build
Muscle	Low muscle mass; finds it difficult to gain muscle
Fat distribution	Very low body fat; lean and slim
Build	Long limbs, thin frame; tall relative to weight
Metabolism	Fast metabolism; finds it difficult to gain weight

Sporting links: Long-distance running, high jump, basketball (some positions), cycling. Ectomorphs benefit from their low body weight and long limbs in endurance and height-based sports.

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Comparing the Three Somatotypes

Feature	Endomorph	Mesomorph	Ectomorph
Shoulders	Narrow	Broad	Narrow
Hips	Wide	Narrow	Narrow
Body fat	High	Low	Very low
Muscle mass	Moderate	High	Low
Limbs	Short, thick	Medium, muscular	Long, thin
Weight gain	Easy	Moderate (mainly muscle)	Difficult
Best for	Power sports (heavyweight), contact sports	Speed, power, strength, all-round sports	Endurance, height-based sports

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Mixed Somatotypes

Most people are not a pure endomorph, mesomorph or ectomorph. They fall somewhere between two or more types.