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Relationship between morphologic somatotypes and standing posture equilibrium.

P Allard1, M L Nault, S Hinse

  • 1Department of Kinesiology, University of Montreal, PQ, Canada. allard-p@ere.umontreal.ca

Annals of Human Biology
|December 1, 2001
PubMed
Summary
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Body shape, or somatotype, impacts balance in girls. Ectomorphs, characterized by a higher height-to-weight ratio, showed poorer standing stability compared to endomorphs.

Area of Science:

  • Biomechanics
  • Anthropometry
  • Human Physiology

Background:

  • Quiet standing stability is influenced by height and weight.
  • Body morphology, defined by somatotypes (endomorphic, mesomorphic, ectomorphic), has not been globally assessed as a factor in standing stability.
  • Understanding these factors is crucial for assessing posture and balance.

Purpose of the Study:

  • To investigate the relationship between morphologic somatotypes and standing posture equilibrium in able-bodied girls.
  • To test the hypothesis that somatotype influences balance control.

Main Methods:

  • 43 able-bodied girls (mean age 13.8 years) participated.
  • Anthropometric measurements determined somatotype components (endomorphy, mesomorphy, ectomorphy).

Related Experiment Videos

  • Center of Pressure (COP) displacement on a force platform assessed standing stability.

    • Main Results:

    • No significant differences in age, height, or weight were found between somatotype groups.
    • Ectomorphs exhibited a statistically larger ellipse surface area (236.9 mm²) for COP displacement compared to endomorphs (137.7 mm²).
    • Ectomorphs also had a longer minor axis (8.1 mm) for COP displacement than endomorphs (5.7 mm).

    Conclusions:

    • Ectomorphic somatotype is associated with decreased standing posture stability in adolescent girls.
    • Factors contributing to reduced stability in ectomorphs include a lower muscle component, higher height-to-weight ratio, and elevated body center of mass.
    • Somatotype should be considered in the assessment of standing posture in both healthy individuals and patients.