Which somatotype is prone to developing poor posture due to excess body weight and lower muscle tone?

The three primary somatotypes, classified by William Sheldon, describe body composition tendencies:

• Endomorph - characterised by a higher proportion of body fat, a wider waist and hips, and a rounder physique.
• Mesomorph - characterised by a muscular, athletic build with broad shoulders and a narrow waist.
• Ectomorph - characterised by a lean, narrow frame with long limbs and low body fat.

The endomorph somatotype is the one most prone to developing poor posture due to excess body weight and lower muscle tone. The additional weight, especially around the abdomen and trunk, shifts the centre of gravity forward, which can cause excessive lumbar lordosis (an exaggerated inward curve of the lower back). The relatively lower muscle tone means the postural muscles (core, back extensors, and hip flexors) may not be strong enough to counteract this gravitational pull, leading to slouching, rounded shoulders, and other postural deviations.

Ectomorphs, being lean and light, do not carry excess weight that would strain posture. Mesomorphs typically have strong musculature that supports good postural alignment. The option suggesting all types are equally prone is incorrect because the specific combination of excess fat and lower muscle tone makes endomorphs distinctly more susceptible.